My Cobra R rims need touching up---is there a matching rattle can color?

If they're the silver color, I believe they're powder coated. It would be tough to match up a spray can color if you just want to do one or a few spots :shrug: . Regular spray paint won't hold up as good over time compared to re-powder coating the wheels, but it'll do the trick for a while anyways.
My sister's bf did his rims on his Tiburon (:rlaugh: ) with a gark graphite engine enamel spray paint just by masking-off the tire, sanding and painting. So far they still look "nice" (as nice as Tiburon wheels get anyways) and its been 8 months.
 
I would say that you could use that but you would need to sand it thoroughly (as mentioned). Then you would need to spray the metal with an etching primer. Then you could spray the color on. If you are tired of polishing, I would recommend it. Better than nothing or leaving your wheels un-polished. You can always strip the paint and re-polish the wheels but it would take a bunch of work. Make sure it's what you want to do.