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Join Date: Feb 2005
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Paint and bodywork advice please....

Hey guys,

So those who know me here have probably seen the evolution of my 930 over the years here on Pelican. I did a complete paint job and even went into the engine bay to make sure the paint color matched. I did all the aero mods too.

I am in the process of getting ready to make the underside of the car as beautiful as the top side and am going to be installing front coil over suspension, Tarett swaybars, and the full 935 suspension set up front and rear along with a 935 X brace under the hood.

SO......My question is. I want the wheel wells and belly pan of the car to be mexico blue now too. What is the best way to prepare the wheel wells and pan to be painted? I have heard there is a 3M product similar to undercoat that you can spray on first, once you have cleaned the surfaces to be coated? Any help here would be great!

Thanks in advance guys.

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77 930 "P Zilla" 3.2 Litre w / EFI conversion
Old 02-23-2009, 06:15 PM
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Maybe i should have posted this elsewhere? Can anyone recommend a different forum to place this in where I might get answers? I know I have seen cars on here that the wheel wells have been painted on. Somebody knows how....

Thanks for any help here.
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77 930 "P Zilla" 3.2 Litre w / EFI conversion
Old 02-24-2009, 02:10 PM
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i have used a "paintable" undercoating form 3m before, not sure what the part # is but it worked out really well. but it was a really slow and annoying paint process compared to doing normal body paint work.

Last edited by carslutt; 02-26-2009 at 04:31 PM..
Old 02-26-2009, 04:22 PM
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So, I'm wondering if I should use that, then after it is cured use bulldog adhesion promoter and then primer, basecoat, clearcoat? Any other thoughts on this?
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77 930 "P Zilla" 3.2 Litre w / EFI conversion
Old 02-26-2009, 04:44 PM
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the way the 3m rep had us use it was, apply under coating, let cure, sprayed w/ a 3m adhesion promoter, base coat, clear coat.

the car we did this on was a dark gray and the under sides color looked fairly close. i was worried if it were a light color that maybe a prep color of some kind would be needed so that the base color would not be extra dark from being applied directly over the under coating. but i never did this again so im not sure what to do in your case, i would bet primer would stick just fine.
Old 02-26-2009, 04:53 PM
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New here but not to paint work. 3M product is Body Shutz. Problem is it doesn't dry too well. Use Wurth product which is what Porsche probably used anyway. It is made to be painted over. You need a special gun for either the 3M or Wurth product. Adhesion promoter probably not needed but don't see how it would hurt. I would throw a bit of flex into the clear as either are soft product and would help with chips.
Old 02-26-2009, 05:01 PM
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Wurth stoneguard good stuff tough prep surface well before spraying it on.
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Old 02-26-2009, 05:58 PM
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Might as well get the ~50pounds of old undercoating off and just paint it like you did the top side.

Wire wheel 90% of it off...aircraft stripper/pressure washer the hard to reach areas....can get messy....(or it was when i did it)

Paint and bodywork forum gets lots of Q&A's for this type of project.

Good luck and of course...PICS PLEASE.

Einar
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Old 02-27-2009, 10:46 AM
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+1 on undercoating removal.
I'd only leave it on in areas where stone pecking will be an issue. Otherwise, our cars can never be light enough.

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Old 02-27-2009, 12:45 PM
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