My eyeglasses have gotten horrible. the coating is all patchy, scratched, etc. In an effort to save buying new, I've been trying to get the coating off completely to no avail. I think it must have been attacked by some noxious agent in the hazardous waste center that is my garage. One suspect was some cold parkerizing solution (phosphoric acid) I had sprayed recently. tried the solution directly on the lenses and polished to no avail. Hmm. Tried alcohol, MEK, various glass polishes (I have plastic lenses!) and nothing works. Can an eyeglass place polish this off, or is there some magic solvent?