Does anyone have any tips or magic potions for getting the crud (mostly bugs) off of the front bumper of my 77? I've tried hot water/soap, bug n tar remover (sparingly), a careful hand with a "scrubby" sponge thingy and lots of elbow grease and cussing.....nothing seems to make a big difference. Thought someone here might have some pointers for me or some words of caution as to what NOT to try! This is not a restored/repainted car, 36 year old paint, but it looks pretty darn good. Thanks.