I've used, forget the exact name, but I think it's Nu Tone? Get it at most auto parts places or Wal mart. Been rated for several years either at the top or close to the top of Consumer Reports ratings. Anything that beads the water up should be fine. My problem is what do you use to get the wax off of the black rubber trim pieces? The wax (any wax) will turn white on the black parts. I'd previously tried Mother's Back to Black, but didn't see much value in it. In fact, it was so bad, I took it back. Wax is just hard to take off of rubber trim.