refinishing

Well so far my faux tank is down to the metal on the top, the bottom is all gummy due to a reaction with Chrome paint and paint stripper, my side covers cant be bead blasted as the PO painted them with some sort of plasti dip and the bead blast isn't touching them, my side scoops were found to...

One of my air scoops has some scratches where the previous owner's key-ring rubbed against it. Are there any tips/tricks on getting a scoop to look good as new? I assume the scoop is some type of plastic? Thanks, MNK