I have used Simple Green and it has not got that rust coloured stuff off totally.

I am going to try the Ajax idea though. As long as you don't scrub mega hard, it should work. SCC ran an article where a professional detailer said he used it gently, and it was the best product for getting off paint impurities and old wax. But be gentle!

98 Silver Frost SVT
"I was doing fine until I ran out of talent."
"It's not whether you win or lose, it's how drunk you get."