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Antique Tractor Paint and Bodywork

Filling rust pitting spots on channel frame

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shane groner

03-13-2006 10:37:35




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Does anyone have any good advice on the best way to smooth out some frame rails on a small tractor? I have a tractor I am restoring that has some deeper pits from leaves sitting on the frame rails for several years. Is the best way to do this to use a bondo type body filler or is there a better way? Any advice will be greatly appreciated.




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EX-pro

03-14-2006 08:45:09




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 Re: Filling rust pitting spots on channel frame in reply to shane groner, 03-13-2006 10:37:35  
I've used Duraglass on things like that before. It is something between JB Weld and Fiberglass resin. It's good over bare metal. If mixed properly it won't come out.



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CNKS

03-13-2006 14:13:06




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 Re: Filling rust pitting spots on channel frame in reply to shane groner, 03-13-2006 10:37:35  
Depends on the depth. When I have deep pits that I am leery about using body filler on, I first use JB weld. It is not made for the purpose, and is very hard to sand but it works, and I don't think it will ever fall out. I then fill the sanding scratches, etc with body filler. You can then prime with epoxy primer and topcoat. If you want a smoother finish, use a sandable primer surfacer over the epoxy -- although the frame rails were probably not smooth to begin with.

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B-maniac

03-13-2006 14:06:55




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 Re: Filling rust pitting spots on channel frame in reply to shane groner, 03-13-2006 10:37:35  
There is absolutely nothing wrong with "bondo type body filler". In actuallity it is all a fiber glass resin with a powdered filler added so you can spread it. The catylist/hardner added to react with the resin and create a flexable fiberglass to use as a filler.There are many "grades",usually determined by the quality and fineness of the filler powder. For what you want to do.first blast the metal clean thenspray 2 coats of epoxy primer,then after 2 hrs. dry fill the pits with a fine filler/catylist often called glaze coat/putty coat or other names(ask your paint/body supplyer). Then sand it smooth and spray 3-4 coats of surfacer/build primer,sand that smooth with 400 wet,then a coat of epoxy as a sealer,then paint.I simplified this some/follow the directions for the products .LOL

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CNKS

03-13-2006 14:36:32




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 Re: Filling rust pitting spots on channel frame in reply to B-maniac, 03-13-2006 14:06:55  
Didn't see your post before I did mine -- I don't disagree, will probably be smoother than my suggestion.



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