By far the best thing to do is NOTHING! I studied this years ago and the opinion of most is to leave it alone, no clear, no oil, no CLR, NO SCOTCHPAD!. Wash it, drive it. Try some silicone base wax in some unseen area if you want shine. But just try in one little area and wait for a few months to see what it does. Those types of waxes do not require much rubbing and will not remove paint like the other waxes will.
If you do nothing its just going to rot into dust.
You have to do something to preserve the thin sheet metal, as well as the frame etc.
CLR is a good idea. And real wax is the best way to go. Or the 3M hand glaze stuff.
