for overspray, if you can take it back, do, usually overspray has to be slowly buffed out so you dont burn the paint its oversprayed on, and when you burn it, you know, you'll end up repaintin that to... my sugestion from personal experience is take it back if you dont like it, let them fix it, that way if they screw up again, they fix it again, and you arent stuck paying to repaint a fender or other parts also.