I recently found some water spots on the hood of my car. I tried one small area by hand wtih Scratch-X, and they came out. But it took some real elbow grease. I just got a PC, and I intend to get the rest out. I want to get a polish like Menzerna or Poorboy's. Since I know Scratch-X works, what other polishes are on the same agressiveness, i.e. Menzerna IP or FP, Poorboy's SSR2 or SSR2? Thanks.