Seems like everything I read on the SPI forums says the best adhesion for the epoxy primer is a sandblasted surface. I know you don't want to hear that. Anything else doesn't provide the "tooth" that sandblasting does.You could try to hit it with a DA (dual action sander..not double acting revolver) but there are so many nooks and crannies on the underside it would take forever.
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70Z28 04B Norwood Forest Green-white Stripes Black DeLuxe Interior
Owned since 1978 - First Car
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