This might sound silly, but Coke works well. Just put some on a rag and rub away. Then just spray it off. I was skeptical the first time I heard this, but it works nicely. Doesn't seem to have effect on the paint. Used this technique on my old Exploder for years and never noticed any paint problems.

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2000 F150 XL Wedgewood Blue. Eclipse flip down CD player, Eclipse point source door speakers. Rockford Fosgate 8' truck box speakers. Fosgate 160x4 punch AMP. Power and appearance mods to come.