Well going thru this cause my son cuda is being done. Did before painting. So is the car apart or together ? you could still take care of it IMO . Not sure all bad it is, you could scotch brite, sand whatever. Wipe down, clean /prep for paint. Tape off good, spray, need a very small gun or air brush to get into spots. Not that you see it, so you could brush some of the spots that you can see.