Clean them up first then paint stripper, sand paper start with 400 working your way up to 1000. then Dremel tool to polish the lip. Acid primer, Filler primer, Colour you want to spray it. last clear coat.
It take about an hour a alloy to clean them and about 2 days to pant and let it set in ETC ETC.
well thats the way iv done it in the past.