If the spots are tiny, then you can clean down to the metal, spray auto primer in a small container and paint on with a very small artist paint brush. Then paint with Rustoleum black paint, either spray or can. I spray it into a small, disposable container and paint it on and feather the edges. Then I use Carnuba wax to protect it. If the whole bed is bad and the decals can't be saved, then I sand, steel wool, prime with the appropriate metal primer, then spray it. From there, you can get new decals or leave it alone. I use the wax rather than a clear coat, but all of this is up to you. It saves the machine for perhaps a full restoration later. White Godzillas have aluminum castings, so require a VERY different primer, which is available at WalMart and white in color, but it takes paint well and so far so good.