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914World.com _ 914World Garage _ Ah, the joys of removing the undercoating

Posted by: ChrisReale Mar 8 2003, 09:08 PM

This stuff is foul . Took me hour and a half to remove the undercoat in the front left wheel well. The stuff was old and crunchy, so I just kind of chiseled it off . Once I get it all off, should i leave it bare, or paint it. If I do paint it, would you say black por-15, or somethijng else?

Posted by: campbellcj Mar 8 2003, 09:31 PM

Is your paint coming up with the schmutz (undercoat)? I have had decent luck chipping it up without disturbing the factory paint too much. If you're getting down to bare metal, then some kind of coating obviously would be a good plan. How well does POR-15 hold up to sandblasting, heat, and water? I have only used it on enclosed areas so far.

Posted by: ChrisReale Mar 9 2003, 12:29 AM

The original paint is seeming to be intact, and in quite fine condition. However, its metallic silver, and the car has since been painted guards red (not by me!!). I thinkl Por-15, if done correctly (Metal Ready then paint) works great in exterior applications. I have a nice pile of this undercoat shit that I am going to save and weigh to see how faster it will make me

Posted by: SirAndy Mar 9 2003, 02:00 AM

undercoating is a bitch. but i was recently advised by scott yeaman (a fellow 914 racer and body-shop owner) who is currently painting my car (thanx scott!) that undercoating helps preventing the FG flares from cracking because it absorbes some of the impact from road-debris and stones that hit the inner fender. i had fine cracks on the seam between metal and FG and the FG itselfs in several spots and he recommened a thick layer of undercoating on the FG part.

Andy

Posted by: Lawrence914-6 Mar 9 2003, 08:03 AM

I had some luck with softening the undercoating with gentle application of a heat gun.

My car having been in the midwest, there were several layers of the stuff. I think the DAPO was a little over-zealous.

I didn't remove all of it, though, just where I needed to do some welding. I covered the area with POR-15, and then topped it with 3M spray undercoating.

Good luck,
Rusty