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Old 09-22-2005, 01:29 AM
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flexable bumper covers getting sprayed with epoxy

ok so im near the end of getting my whole 82 grandprix in epoxy primer. just gota do my trunk jam, mirrors, and bumper covers. then drive this beast for hopefully a month before the snow flys and that wonderful salt comes out all over the roads.

how do i prep my bumper covers that are a flexable? do i use my DA sander? what grits should i use? ive been using 120 on the metal parts before spraying.

i am using dupont DTM epoxy primer, and i have a rattle can of adhedsion promoter the body shop sold me.

Thank you

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Old 09-22-2005, 01:24 PM
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I would use a finer paper for the plastic parts, just scuff them up good and spray.
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Old 09-22-2005, 02:11 PM
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Are the bumper covers bare urethane or painted. Personally I only use adhesion promotor on them if it is bare urethane. If in good shape sand with around 320-400 on a da, and what you cant get with the da sand by hand. Spray your epoxy as a sealer and paint. If there are scratches and gouges to fill or something like that then you may want to sand bad areas with a courser grit to feather stuff out, put down adhesion promoter and epoxy on bare urethane and use a urethane filler primer then sand that with your final grit for paint. The most important thing is to clean the part well before and after sanding and do a very good job sanding so the paint won't peel later. A flex additive isn't really needed if you are using a urethane base clear system and don't use lacquer products.
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