Zip if its just faded and not peeling off just scrub it down good with some enamel reducer, I rubbed mine down about 3 different times just to be safe. Apply the dye in real light coats. I put about 6 coats of black and then applied about 3 coats of the clear. I am still amazed at how everything turned out!
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Chris
As close to "Normal" as I can get...