DB Mathews Furthermore Last month took quick look model aircraft finishing systems lose part contents reach final form change liquid solid state evaporating solvents dry set discussion mentioned use nitrate butyrate dopes paper silk-covered models superb video Larry Kruse demonstrates lightweight covering finishing techniques models available Robins View Productions Box 68 Stokertown PA 18083 paraphrase old Tonight Show everything could possibly want know contained sealed videocassette month Ill overview some materials depend losing chemicals adding two chemical compounds together create different material phenomenon referred addition reaction Catalyzed materials commonly referred epoxies can polyurethanes Imron example enamels Centari true epoxies Hobbypoxy modelers friend cyanoacrylate adhesives catalyzed moisture change pH acid alkaline thats what kickers Other compounds catalyzed heat pressure light finishing materials commonly used modeling created addition reactions Adding Part Part B few drops catalysts starts curing action catalyzed addition field catalyzed chemical reactions incredible far beyond scope knowledge Catalyzed reactions heart series industrial processes used refineries chemical plants convert petroleum everything clothing pharmaceuticals Hobbypoxy This epoxy finishing system introduced model airplane hobby March 1963 has remained favorite ever since Pettit Paint Co Belleville New Jersey previously successful marine finish field Bev Smith member Pettit s marketing staff modeler influenced firm market product modelers use Remember era really pretty finishes 20 coats hand-rubbed dope Only diligent expert modelers capable such shiny finishes seen competition Control Line Stunt models Others stood awe modelers craftsmanship introduction catalyzed epoxy finishes duffers could create finishes comparable dope beautiesbut simply quickly material loaded pigment compared thinness butyrate dope because dope has degas bottom out thick coats invariably trap solvents leading sorts misery dry other hand epoxies cure internally releasing very little volatile material therefore can much richer thicker color coats learning curve new epoxies some modelers difficulty material could brushed really needed sprayed reach its maximum beauty spray guns compressors available large expensive well out domain hobby items Gradually less-expensive less-maintenance-sensitive spray equipment developed hobby use modelers learued required techniques Modelers also quickly learned heed manufacturers advice avoid mixing products successive coats Hobbypoxys fillers meant used base coats superior sanding sealer dope Equally impressive much harder surfaces compared dope Epoxies infinitely durable set less day resist 60% nitro fuel spills catalyzed epoxies represent huge leap forward modeling technologies make possible us marginal craftsmen produce previously impossible finishes Ive included photo George Sauers big five-cylinder OS radialpowered WACO example superb Hobbypoxy finished model George has reputation area superbly done airplanes uses Super Coverite Hobbypoxy Although some February 1998 67 Panel covered clear Worldtex two coats clear nitrate dope two coats Ultrapoxy finishing materials materials stuck well Ultrapoxy Second test showed finishing materials tested adhered nitrate dope Ultrapoxy covered darker colors compatible brands models rather old much-flown still look splendid Hobbypoxy still available 35 years later no discernible change chemistry though can labels have modernized Good stuff good stuff now Super Poxy K&B introduced its catalyzed finishing system shortly after Hobbypoxy introduced Small technique differences existed such eliminating need 45-minute waits after mixing more-rapid setting times variance flow rate Any discussion Super Poxys merits superfluous since has forced off market EPA Environmental Protection Agency Ultrapoxy being written late September Less week ago received samples K&B s replacement Super Poxy hurriedly did some nonscientific testing following personal opinion once new improved product actually risk upsetting someone has far better understanding organic chemistry seems Ultrapoxy part contains toluene carcinogen ester solvents combines part Bs polyamides butyl alcohol create polyamide ester tolulol much safer alcohol form toluene Mixed unmixed other catalyzed finishing materials have health risks handled carelessly magazines Safety Comes First column has reported number serious health problems associated misuse group finishes Simply put dont breathe swallow paint yourself materials Filter masks easily purchased lungs should also wear head cover such cap painting materials reason Ones scalp very porous piece skin making passage through much easier through say ones hands painter still has hair holds overspray contact scalp long time Color Matching As write Ultrapoxy available white bright red black Medium blue yellow Cub yellow orange As may recall crayon days elementary school yellow red blue three basic colors others colors can made Black white change chroma depth basic colors Since most-common use catalyzed finishing materials cowls pants models covered heat-shrink MylarsTM does match colors K&B will have color-mixing chart purpose Theoretically should possible mix match covering materials color chroma except metallic shades needs accurate measuring devices such disposable plastic pipettes graduated cylinders measure specified quantities basic colors match heat shrink Dealers might love since will need stock ajillion premixed matching colors neither will builders So Does Work Already Although Ultrapoxy thin enough spray adding thinner remarkably rich pigments very smooth Flow excellent light tack coat followed flow coat about 15 minutes later produced no runs As few Ive ever encountered spray finish material can brushed fairly well minimum brush marks spraying vastly preferred Next month Ill report economical spray gun resolve nagging problem Panel photos covered clear Worldtex followed two coats clear nitrate dope top brushed two coats white Ultrapoxy allowed everything cure 24 hours assess compatibility other finishes masked panel 3MTM tape mentioned last months column brushed following left right RustOleumTM LusterKote Krylon 21st Century Paint Perfect brand polyurethane Super Poxy Hobbypoxy butyrate dope nitrate dope Super Poxy primer finish materials tested stuck Ultrapoxy no bubbling crazing lifting have never seen material compatible reason some samples panel look smeared rubbed rag soaked 10% nitro fuel Lusterkote Krylon butyrate nitrate dope did stay put subjected glow fuel Panel B also covered Worldtex given two coats nitrate dope masked painted same group finishing materials right left adhered well clear nitrate dope After curing masked strip brushed Ultrapoxy top Again surprise Ultrapoxy covered darker colors compatible brands tested After cured day rubbed dickens out no flaking scratching evident Verdict Although putting Ultrapoxy underneath top of listed finishing materials neither particularly wise nor necessary fact new material such low volatility makes preceding test successful very interesting resistance nitromethane hardness cured surface exemplary perhaps important Ultrapoxy user-friendly Its good rest better Come Next month Ill look catalyzed automobile enamel inexpensive device makes possible spray additional reaction materials equivalent spray can meantime hopefully Ive stimulated investigate some finishing materials can increase Flying Fun odel Aviation ge Sauers 88-inch WACO YMF has Super Coverite covering Hobbypoxy Jim Pepino plans American Kit Cutters Sauers Wichita KS model powered 0S five-cylinder fourstroke engine McDaniel onboard five-plug glow driver
Edition: Model Aviation - 1998/02
Page Numbers: 67, 68
DB Mathews Furthermore Last month took quick look model aircraft finishing systems lose part contents reach final form change liquid solid state evaporating solvents dry set discussion mentioned use nitrate butyrate dopes paper silk-covered models superb video Larry Kruse demonstrates lightweight covering finishing techniques models available Robins View Productions Box 68 Stokertown PA 18083 paraphrase old Tonight Show everything could possibly want know contained sealed videocassette month Ill overview some materials depend losing chemicals adding two chemical compounds together create different material phenomenon referred addition reaction Catalyzed materials commonly referred epoxies can polyurethanes Imron example enamels Centari true epoxies Hobbypoxy modelers friend cyanoacrylate adhesives catalyzed moisture change pH acid alkaline thats what kickers Other compounds catalyzed heat pressure light finishing materials commonly used modeling created addition reactions Adding Part Part B few drops catalysts starts curing action catalyzed addition field catalyzed chemical reactions incredible far beyond scope knowledge Catalyzed reactions heart series industrial processes used refineries chemical plants convert petroleum everything clothing pharmaceuticals Hobbypoxy This epoxy finishing system introduced model airplane hobby March 1963 has remained favorite ever since Pettit Paint Co Belleville New Jersey previously successful marine finish field Bev Smith member Pettit s marketing staff modeler influenced firm market product modelers use Remember era really pretty finishes 20 coats hand-rubbed dope Only diligent expert modelers capable such shiny finishes seen competition Control Line Stunt models Others stood awe modelers craftsmanship introduction catalyzed epoxy finishes duffers could create finishes comparable dope beautiesbut simply quickly material loaded pigment compared thinness butyrate dope because dope has degas bottom out thick coats invariably trap solvents leading sorts misery dry other hand epoxies cure internally releasing very little volatile material therefore can much richer thicker color coats learning curve new epoxies some modelers difficulty material could brushed really needed sprayed reach its maximum beauty spray guns compressors available large expensive well out domain hobby items Gradually less-expensive less-maintenance-sensitive spray equipment developed hobby use modelers learued required techniques Modelers also quickly learned heed manufacturers advice avoid mixing products successive coats Hobbypoxys fillers meant used base coats superior sanding sealer dope Equally impressive much harder surfaces compared dope Epoxies infinitely durable set less day resist 60% nitro fuel spills catalyzed epoxies represent huge leap forward modeling technologies make possible us marginal craftsmen produce previously impossible finishes Ive included photo George Sauers big five-cylinder OS radialpowered WACO example superb Hobbypoxy finished model George has reputation area superbly done airplanes uses Super Coverite Hobbypoxy Although some February 1998 67 Panel covered clear Worldtex two coats clear nitrate dope two coats Ultrapoxy finishing materials materials stuck well Ultrapoxy Second test showed finishing materials tested adhered nitrate dope Ultrapoxy covered darker colors compatible brands models rather old much-flown still look splendid Hobbypoxy still available 35 years later no discernible change chemistry though can labels have modernized Good stuff good stuff now Super Poxy K&B introduced its catalyzed finishing system shortly after Hobbypoxy introduced Small technique differences existed such eliminating need 45-minute waits after mixing more-rapid setting times variance flow rate Any discussion Super Poxys merits superfluous since has forced off market EPA Environmental Protection Agency Ultrapoxy being written late September Less week ago received samples K&B s replacement Super Poxy hurriedly did some nonscientific testing following personal opinion once new improved product actually risk upsetting someone has far better understanding organic chemistry seems Ultrapoxy part contains toluene carcinogen ester solvents combines part Bs polyamides butyl alcohol create polyamide ester tolulol much safer alcohol form toluene Mixed unmixed other catalyzed finishing materials have health risks handled carelessly magazines Safety Comes First column has reported number serious health problems associated misuse group finishes Simply put dont breathe swallow paint yourself materials Filter masks easily purchased lungs should also wear head cover such cap painting materials reason Ones scalp very porous piece skin making passage through much easier through say ones hands painter still has hair holds overspray contact scalp long time Color Matching As write Ultrapoxy available white bright red black Medium blue yellow Cub yellow orange As may recall crayon days elementary school yellow red blue three basic colors others colors can made Black white change chroma depth basic colors Since most-common use catalyzed finishing materials cowls pants models covered heat-shrink MylarsTM does match colors K&B will have color-mixing chart purpose Theoretically should possible mix match covering materials color chroma except metallic shades needs accurate measuring devices such disposable plastic pipettes graduated cylinders measure specified quantities basic colors match heat shrink Dealers might love since will need stock ajillion premixed matching colors neither will builders So Does Work Already Although Ultrapoxy thin enough spray adding thinner remarkably rich pigments very smooth Flow excellent light tack coat followed flow coat about 15 minutes later produced no runs As few Ive ever encountered spray finish material can brushed fairly well minimum brush marks spraying vastly preferred Next month Ill report economical spray gun resolve nagging problem Panel photos covered clear Worldtex followed two coats clear nitrate dope top brushed two coats white Ultrapoxy allowed everything cure 24 hours assess compatibility other finishes masked panel 3MTM tape mentioned last months column brushed following left right RustOleumTM LusterKote Krylon 21st Century Paint Perfect brand polyurethane Super Poxy Hobbypoxy butyrate dope nitrate dope Super Poxy primer finish materials tested stuck Ultrapoxy no bubbling crazing lifting have never seen material compatible reason some samples panel look smeared rubbed rag soaked 10% nitro fuel Lusterkote Krylon butyrate nitrate dope did stay put subjected glow fuel Panel B also covered Worldtex given two coats nitrate dope masked painted same group finishing materials right left adhered well clear nitrate dope After curing masked strip brushed Ultrapoxy top Again surprise Ultrapoxy covered darker colors compatible brands tested After cured day rubbed dickens out no flaking scratching evident Verdict Although putting Ultrapoxy underneath top of listed finishing materials neither particularly wise nor necessary fact new material such low volatility makes preceding test successful very interesting resistance nitromethane hardness cured surface exemplary perhaps important Ultrapoxy user-friendly Its good rest better Come Next month Ill look catalyzed automobile enamel inexpensive device makes possible spray additional reaction materials equivalent spray can meantime hopefully Ive stimulated investigate some finishing materials can increase Flying Fun odel Aviation ge Sauers 88-inch WACO YMF has Super Coverite covering Hobbypoxy Jim Pepino plans American Kit Cutters Sauers Wichita KS model powered 0S five-cylinder fourstroke engine McDaniel onboard five-plug glow driver