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carslutt carslutt is offline
yep, im slow in the head
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Join Date: Feb 2009
Location: riVersiDe, cA
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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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