AirTalk.org Aviation discussions newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Steel prep for two part epoxy?          AirTalk.org Forum Index -> Aircraft Design & Building View previous topic :: View next topic   Author Message Michael Horowitz Guest Posted: Sat May 12, 2007 5:15 pm    Post subject: Steel prep for two part epoxy? I have yet to decide what epoxy to use on my steel fuselage, so I have no literature on how to prep the metal. Part of my decision making is _where_ to do the work. If I have to use MEK or like solvent, I don't want to do the work in a semi-enclosed area; if a dry wipe-down or alchol is sufficient, then my work-place of choice is OK. Assuming I"ve brought to fuselage back to bare metal and have used emery cloth so there exists a 'tooth' to the metal, does metal prep require the use of MEK or acytone prior to primer application? - Mike Back to top Orval Fairbairn Guest Posted: Sat May 12, 2007 8:36 pm    Post subject: Re: Steel prep for two part epoxy? In article <fgbb43tkl20lajba7qer8fasgh0j3cnjfa (AT) 4ax (DOT) com>, Michael Horowitz <mhorowit (AT) cox (DOT) net> wrote: Quote: I have yet to decide what epoxy to use on my steel fuselage, so I have no literature on how to prep the metal. Part of my decision making is _where_ to do the work. If I have to use MEK or like solvent, I don't want to do the work in a semi-enclosed area; if a dry wipe-down or alchol is sufficient, then my work-place of choice is OK. Assuming I"ve brought to fuselage back to bare metal and have used emery cloth so there exists a 'tooth' to the metal, does metal prep require the use of MEK or acytone prior to primer application? - Mike For steel (or any metal, for that matter), you have to remove all oils/greases. A wipe down with lacquer thinner, MEK, alcohol, etc. will do this. Look for a clean-looking cloth or paper towel. You should also remove any welding scale, which consists of oxides of iron before priming. This process usually involves fine-particulate (glass beads are best) blasting of welded areas to clean the metal. As soon as the metal is clean, apply two-part epoxy primers. Wear appropriate breathing protection, as the stuff is cumulatively toxic and allergenic. Back to top Clay Guest Posted: Sat May 12, 2007 9:00 pm    Post subject: Re: Steel prep for two part epoxy? Wear good quality gloves which are resistant to the chemicals you will be using. I would not use alcohol because it contains water. The water in the alcohol can cause flash rusting. Acetone is a little kinder to the body than MEK. MEK and Acetone are both flammable, so be careful. Orval has given very sound advise. Wear eye protection. Back to top Maxwell Guest Posted: Sat May 12, 2007 9:02 pm    Post subject: Re: Steel prep for two part epoxy? "Michael Horowitz" <mhorowit (AT) cox (DOT) net> wrote in message news:fgbb43tkl20lajba7qer8fasgh0j3cnjfa (AT) 4ax (DOT) com... Quote: I have yet to decide what epoxy to use on my steel fuselage, so I have no literature on how to prep the metal. Part of my decision making is _where_ to do the work. If I have to use MEK or like solvent, I don't want to do the work in a semi-enclosed area; if a dry wipe-down or alchol is sufficient, then my work-place of choice is OK. Assuming I"ve brought to fuselage back to bare metal and have used emery cloth so there exists a 'tooth' to the metal, does metal prep require the use of MEK or acytone prior to primer application? - Mike I would suggest a stainless steel rotary brush and a high speed grinder, if you can't bead blast the weld areas. Clean the areas to be brushed thououghy with MEK or acetone before brushing, and clean the brush often in MEK or acetone, to avoid spreading any oil or grease. Change wiping cloths or paper towels often to avoid any build up in your cloth. Back to top Michelle P Guest Posted: Sun May 13, 2007 9:38 pm    Post subject: Re: Steel prep for two part epoxy? Michael Horowitz wrote: Quote: I have yet to decide what epoxy to use on my steel fuselage, so I have no literature on how to prep the metal. Part of my decision making is _where_ to do the work. If I have to use MEK or like solvent, I don't want to do the work in a semi-enclosed area; if a dry wipe-down or alchol is sufficient, then my work-place of choice is OK. Assuming I"ve brought to fuselage back to bare metal and have used emery cloth so there exists a 'tooth' to the metal, does metal prep require the use of MEK or acytone prior to primer application? - Mike Bare metal. Abrasive then wipe with denatured alcohol, Acetone or MEK depending on if anything is left. They are all in the same family. Alcohol being the mildest and MEK the strongest. Nitrile glove are a must for all phases of the prep. Respirator is a good idea as well. Eye protect is always a good idea. Michelle Back to top Ebby Guest Posted: Sat May 19, 2007 5:15 am    Post subject: Re: Steel prep for two part epoxy? After reading this I have a question for those who have gone through this process. I have a freshley welded steel tube fuselage with no surface rust at all. Is is necessary to sandblast the whole thing then prime or can I use scuffs and emery with the stainless brush mentioned? Seems like media blasting with sand or glass is a bit harsh for a new fuselage. What do they do at maule? All that needs to be removed is the dark mill scale and epoxy, from what I've heard will stick to almost anything. "Ebby" Hatz Classic s/n37 NY "Michelle P" <thecatsandiSPAMMEIFYOUDARE (AT) earthlink (DOT) net> wrote in message news:_9H1i.6486$296.6474 (AT) newsread4 (DOT) news.pas.earthlink.net... Quote: Michael Horowitz wrote: I have yet to decide what epoxy to use on my steel fuselage, so I have no literature on how to prep the metal. Part of my decision making is _where_ to do the work. If I have to use MEK or like solvent, I don't want to do the work in a semi-enclosed area; if a dry wipe-down or alchol is sufficient, then my work-place of choice is OK. Assuming I"ve brought to fuselage back to bare metal and have used emery cloth so there exists a 'tooth' to the metal, does metal prep require the use of MEK or acytone prior to primer application? - Mike Bare metal. Abrasive then wipe with denatured alcohol, Acetone or MEK depending on if anything is left. They are all in the same family. Alcohol being the mildest and MEK the strongest. Nitrile glove are a must for all phases of the prep. Respirator is a good idea as well. Eye protect is always a good idea. Michelle Back to top Orval Fairbairn Guest Posted: Sat May 19, 2007 6:11 am    Post subject: Re: Steel prep for two part epoxy? In article <464e4194$0$4724$4c368faf (AT) roadrunner (DOT) com>, "Ebby" <jebenspe (AT) twcny (DOT) rr.com> wrote: Quote: After reading this I have a question for those who have gone through this process. I have a freshley welded steel tube fuselage with no surface rust at all. Is is necessary to sandblast the whole thing then prime or can I use scuffs and emery with the stainless brush mentioned? Seems like media blasting with sand or glass is a bit harsh for a new fuselage. What do they do at maule? All that needs to be removed is the dark mill scale and epoxy, from what I've heard will stick to almost anything. I don't know what they do at Maule, but you need to have metal under the epoxy -- not oxides of iron. Bead blasting the discolored areas around the welds is a good way to remove any extraneous oxides that could crack and attract water. The most important part of the prep is to remove all traces of oils and grease (including those from hands) before priming. An airbrush is a good way to apply primer, as it has a narrow pattern and will not waste too much expensive paint and primer. Back to top Michelle P Guest Posted: Sun May 20, 2007 6:11 am    Post subject: Re: Steel prep for two part epoxy? Ebby wrote: Quote: After reading this I have a question for those who have gone through this process. I have a freshley welded steel tube fuselage with no surface rust at all. Is is necessary to sandblast the whole thing then prime or can I use scuffs and emery with the stainless brush mentioned? Seems like media blasting with sand or glass is a bit harsh for a new fuselage. What do they do at maule? All that needs to be removed is the dark mill scale and epoxy, from what I've heard will stick to almost anything. "Ebby" Hatz Classic s/n37 NY "Michelle P" <thecatsandiSPAMMEIFYOUDARE (AT) earthlink (DOT) net> wrote in message news:_9H1i.6486$296.6474 (AT) newsread4 (DOT) news.pas.earthlink.net... Michael Horowitz wrote: I have yet to decide what epoxy to use on my steel fuselage, so I have no literature on how to prep the metal. Part of my decision making is _where_ to do the work. If I have to use MEK or like solvent, I don't want to do the work in a semi-enclosed area; if a dry wipe-down or alchol is sufficient, then my work-place of choice is OK. Assuming I"ve brought to fuselage back to bare metal and have used emery cloth so there exists a 'tooth' to the metal, does metal prep require the use of MEK or acytone prior to primer application? - Mike Bare metal. Abrasive then wipe with denatured alcohol, Acetone or MEK depending on if anything is left. They are all in the same family. Alcohol being the mildest and MEK the strongest. Nitrile glove are a must for all phases of the prep. Respirator is a good idea as well. Eye protect is always a good idea. Michelle I have a powder coated airframe in my Maule. It is my understanding that bright shiny metal is achieved before the coating is applied. Michelle Back to top Ebby Guest Posted: Mon May 21, 2007 6:11 am    Post subject: Re: Steel prep for two part epoxy? In anticipation of your answers I did a major spring clean of the garage this weekend so I can set up a blasting/paint shop later on this summer. I was just hoping I could get by without chewing into all that new metal. My advisor at my EAA chapter tipped me off about using an airbrush. Hearing it again helps. Thanks for the advice. Ebby "Michelle P" <thecatsandiSPAMMEIFYOUDARE (AT) earthlink (DOT) net> wrote in message news:NbQ3i.11531$Ut6.9106 (AT) newsread1 (DOT) news.pas.earthlink.net... Quote: Ebby wrote: After reading this I have a question for those who have gone through this process. I have a freshley welded steel tube fuselage with no surface rust at all. Is is necessary to sandblast the whole thing then prime or can I use scuffs and emery with the stainless brush mentioned? Seems like media blasting with sand or glass is a bit harsh for a new fuselage. What do they do at maule? All that needs to be removed is the dark mill scale and epoxy, from what I've heard will stick to almost anything. "Ebby" Hatz Classic s/n37 NY "Michelle P" <thecatsandiSPAMMEIFYOUDARE (AT) earthlink (DOT) net> wrote in message news:_9H1i.6486$296.6474 (AT) newsread4 (DOT) news.pas.earthlink.net... Michael Horowitz wrote: I have yet to decide what epoxy to use on my steel fuselage, so I have no literature on how to prep the metal. Part of my decision making is _where_ to do the work. If I have to use MEK or like solvent, I don't want to do the work in a semi-enclosed area; if a dry wipe-down or alchol is sufficient, then my work-place of choice is OK. Assuming I"ve brought to fuselage back to bare metal and have used emery cloth so there exists a 'tooth' to the metal, does metal prep require the use of MEK or acytone prior to primer application? - Mike Bare metal. Abrasive then wipe with denatured alcohol, Acetone or MEK depending on if anything is left. They are all in the same family. Alcohol being the mildest and MEK the strongest. Nitrile glove are a must for all phases of the prep. Respirator is a good idea as well. Eye protect is always a good idea. Michelle I have a powder coated airframe in my Maule. It is my understanding that bright shiny metal is achieved before the coating is applied. Michelle Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         AirTalk.org Forum Index -> Aircraft Design & Building All times are GMT Page 1 of 1   Jump to: Select a forum Aviation----------------alt.aviationAviation safety EnhancementPlanes, gliders and flying in AustraliaAviation et pilotage (Français)rec.aviationAviation (Aerobatics)Hot air, gas balloons and airshipsHang-gliding, paragliding, foot-launched flightAircraft Design & BuildingInstrument Flight RulesAviation (Classifieds)Military AircraftNaval AviationAviation (Miscellaneous Topics)Owning AirplanesAviators (General Discussions)Aviation related productsAircraft RestorationHelicopters and rotary wing aircraftsFlight SimulationSailplanesAviation (Students)Light aircraftFlying related activities in the UK Airports----------------alt.airportsEdinburgh Airport Glasgow Airport Humberside Airport Luton Airport Aberdeen Airport Glasgow Prestwick Airport  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum Powered by phpBB © 2001, 2006 phpBB Group SEO toolkit © 2004-2006 webmedic.