One of these will only tell you if it has paint over paint, that doesn't concern me as much as paint on the rubber, rubber not replaced, rubber replaced poorly, rubber not removed so proper sanding can be done, etc. Stuff you can tell by looking closely, if the paint looks "good" why should I care? (excluding recent paint looking good)
http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=95520
