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When the bumper repair is completed, apply two wet coats of flexible part sealer. After drying for 30 minutes, the fascia is ready for priming and painting. Prime the fender with two coats of any two-part primer-surfacer, making sure to let the primer dry between coats. Once the primer has hardened, dry sand the repaired areas with 400-grit paper to level it and remove any imperfections. Before spraying the bumper with basecoat, wetsand it and gently wipe the area with a tack rag to remove dust, then spray according to the manufacturer’s instructions. You may need to repeat this process two or three times to cover completely. Once the base coat is dry (usually about 30 minutes), mix the clearcoat with hardener. Apply two medium clearcoats, allowing each to dry in between. After drying overnight, the fascia is ready to be reinstalled.