Here's an interesting one for you - a friend of mine has a V Raptor, and what Bob Reeves told him to clean it with was Lime Away or CLR - the stuff that cleans up hard water stains! He says use it full strength every few months, even on pistons, and it gets rid of any type of corrosion that has started. He tried it and it worked great! I'm going to try it myself soon. Just had to get the word out on this one - has anyone else tried it?