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Antique Tractor Paint and Bodywork

Need play by play in Painting

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gwv

12-27-2003 17:28:59




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I have an H that I would like to get painted and dont know where to start. This tractor has been painted about a year ago with enamal. The prep work from what I can tell was poor and I have taken and sandblasted and primed all the little parts. Stripped all the tin to bare metal.What do you all recommend to use to seal the old/new paint on the cast.I have read in some of these posts you need a sealer to seal the old paint so the two part primer will stick (epoxy primer???) and than the top coat put on.The paint that is on it is smooth and not chipping. Thanks for any help you can give.

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CNKS

12-27-2003 19:00:34




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 Re: Need play by play in Painting in reply to gwv, 12-27-2003 17:28:59  
Epoxy primer acts as a sealer. I would have to see the cast to have anywhere near an accurate opinion. Like Butch I like to remove the old paint. If the prep work was poor on the sheet metal it was probably poor on the cast also. Cast does not reflect light as well as a smooth surface, therefore a poor paint job may look ok for a while, but eventually the paint will fade and adhesion will be poor. Cast is what I would call "dirty", literally. Dirt, grease, etc gets in the pores and is very hard to remove. The previous owner probably painted over all of that. Sooner or later it will flake, rust, or peel off.

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Butch

12-27-2003 18:20:45




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 Re: Need play by play in Painting in reply to gwv, 12-27-2003 17:28:59  
There are differences in opinion on the cast, as well as the need to remove all the old paint. It is never a bad idea to get down to bare metal but must it be done for good adhesion? No,IF the underlying paint is sound, not flaking of pealing. I don't like to sandblast the main castings, things like the transmission case, engine block etc. Reason being is it is darm near impossible to get rid of all the sand. I usualy wire wheel the castings to get rid of loose paint and rust. If the paint is thick I use a needle scaler first. Then e-prime asap after they are clean. In my opinion there is no need for additional sealers with the epoxy-primers no matter what is underneath of them.

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gwv

12-27-2003 19:18:07




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 Re: Re: Need play by play in Painting in reply to Butch, 12-27-2003 18:20:45  
true or false. I have read in some of the posts that an epoxy primer over enamal will create one big gooey mess.and then it will have to be striped down to bone. can you suggest what the medinm price brand to use.



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Rod (NH)

12-27-2003 19:48:59




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 Re: Re: Re: Need play by play in Painting in reply to gwv, 12-27-2003 19:18:07  
Hi gwv,

That's the first I have heard about the possibility of epoxy primer causing any kind of problem over any old, cured surface. Sealers are used to avoid incompatibility problems between two different paint films and/or to provide an even color holdout for the topcoat. The automotive two-part epoxy primer is a non-sanding primer and does double duty as a sealer, if one is needed or used. It SHOULD go on top of about anything and about anything SHOULD go on top of it without problems. There are no agressive solvents in it as there are in many topcoats. If you are going to keep the old enamel finish, I would recommend scuffing it up well with a coarse Skotchbrite pad prior to a single coat of epoxy and topcoat within the epoxy window. PPG MP170 is, IMO, a good, cost effective epoxy primer in the lower end of the price range.

third party image Rod

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