I have a couple of aluminum intake manifolds and a plastic box that has a dial caliper in it. These parts were purchased at a swap meet and the vendor marked the purchase price on each piece with a magic marker. Is there an easy way to remove magic marker from parts? So far I have tried varsol, paint thinner, gasoline, and acetone and none of these don't seem to have any effect at all in removing the magic marker. Anyone have a solution to remove magic marker?