Re: Thanks CNKS to all you paint guys, more opini

Posted by CNKS on March 23, 2005 at 07:19:18 from (204.249.178.138):

In Reply to: Thanks CNKS to all you paint guys, more opinions posted by scott#2 on March 23, 2005 at 05:32:52:

Your sheet metal will be smoother if you use a sandable primer surfacer such as PPG MP 181 over the filler and epoxy. You can use PPG 2K MP 182 urethane surfacer, which has to have hardener, if you have a supplied air system. I use body filler on bare metal, without using epoxy first; some people recommend using epoxy first, then the filler, then more epoxy. I really don't have an opinion on that except the way I do it saves a step. Don't use metal prep -- that is used by body shops who don't want to sand new bare metal. To save work you can strip the sheet metal with chemical paint stripper, then sand it with 180 grit sand paper to remove the underlying rust. Metal prep in this case is redundant, you don't need it. You don't want to get the sheet metal too rough, otherwise you will have to apply more coats and do more sanding on the surfacer. For the small parts, you can wire wheel them or sandblast or use electrolysis (I haven't tried electrolysis yet), whichever suits you. Treat with a wax and grease remover on ALL parts, sheet metal, and chassis before using epoxy. A good one is PPG DX 330. It's a good idea to use the wax and grease remover before you wire brush as the brushing grinds everything into the surface, but I usually don't. Again, don't use metal prep on the chassis, if it has to set a long time after wire brushing without being painted you can use a rust preventive treatment such as Picklex 20 (do a search), this is not washed off, but does react with the cast. Then do repeated applications of wax and grease remover until the rags come back clean -- this will take a long time. On most tractors it is best to remove all the paint because there will be rust under it. If your tractor has not been repainted, it is rusty and the remaining paint is shot. If it hss been repainted, chances are the previous owner or even the dealer did a wash and spray job, and there is still rust under it. Only if you are SURE the old paint is in good condition can it be sanded and sealed with epoxy primer, without stripping it. This is sort of a jumbled response, so ask again if I am not clear on something.

Follow Ups:

• Re: Thanks CNKS to all you paint guys, more opini scott#2 09:55:56 03/23/05 (3)
  • Re: Thanks CNKS to all you paint guys, more opini CNKS 11:19:14 03/23/05 (2)
    • Re: Thanks CNKS to all you paint guys, more opini Opa A 17:43:19 03/23/05 (1)
      • Re: Thanks CNKS to all you paint guys, more opini CNKS 18:25:21 03/23/05 (0)

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