WD-40 is a MULTI-PURPOSE cleaner. It is sweet. i use it for lots of things including the spooge like RM_guy stated. I would personally try that first then try the soft scrub. I use the soft scrub on my front disc cover and it seems to do a fairly decent job of cleaning it up and making it look like new. I also am a big fan of after a fender/plastics gets lots of scratches/gets really dull of using the PC PLASTIC RENEW its fairly cheap and works good i just take off my plastics once a year and do them wiht that in the winter. The ol' KDXs look like new(sept for the dents in the pipe,etc, etc)!