Does anyone have any suggestions for KEEPING the carburetion/grease stains off the transom of my boat? Ive got a 1997 Powerquest w/ Carbureted 454 Mag..........Get a TON of grease/carburetion build up after each use. Always have to wash the back with 409, Simple Green, or soap to get it off. How do I keep it off in the first place? Obviously comes out the thru hull exhaust ports.........Thanks!