Join Date: Dec 2001
Location: Belleville, Illinois
Thanked 22 Times in 17 Posts
Re: painting engine ?
What Tim said. If it really bothers you, use Naval Jelly, a caustic that will remove rust, or a rust converter which will turn red-brown rust to a hard, black oxide that's very tough. Simple Green is mainly a degreasing detergent concentrate. I don't think it will do anything to rust, but it's a good prep cleaner.
But all you really need to do is use a wire brush to get the loose stuff off, apply primer and then the finish color.