Easy-Off Oven Cleaner works great !!. The trick is not to leave it on two long. A guy that has done some pinstrip work for me cleaned up my tank, by removing some feathers that were painted on it. He sprayed it on and let it sit for about 30 sec. then wiped it of followed by a good wipe down with fresh water. He did this 2 or 3 times till it was all off and did not harm the clearcoat.