Question regarding an old '02 Grand Prix "grocery getter." Car isn't in the best shape and I have no intentions of bringing it into such condition, but the young lady who owns it would like a number of paint defects (like, missing paint) repaired on the front bumper cover. Probably the most appropriate route in that regard is a rattle can job with duplicolor (unless somebody can recommend a better yet not more expensive product) with a little duplicolor clear on top. My question is whether I need to use their adhesion promoter beneath the duplicolor rattle can since I'm painting on plastic?





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