Wipe the area with wax and grease remover, then sand with 180 to 220 grit abrasive and re-clean using a quality pre-paint cleaner.
LiNE LiNE Automotive Grade 2K Epoxy Primer Direct to Metal - White - 2 Quart Kit
LiME LiNE Automotive Grade Urethane Reducer Automotive Basecoat & Primer Gallon
LiME LiNE Automotive Grade Urethane Reducer - Paint Thinner - 2 Quart Cans
LiNE LiNE Epoxy Primer, Automotive Grade, Direct to Metal - Light Grey - 2 Qt
LiNE LiNE Epoxy Primer - Automotive Grade -Direct to Metal - Black 1 Gallon Kit
LiNE LiNE Epoxy Primer, Automotive Grade, Direct to Metal - Black - 2 Quart