Stripper.

Yes, the EPA had methylene chloride removed from consumer use toward the beginning of the year. All you can find on store shelves now is the "improved", and safer product. Check your can to see if it contains methylene chloride. If not, the product will probably not remove automotive paint. I too, found aircraft stripper (the old stuff with a high percentage of MC) to work best. If your product contains methylene chloride try disturbing the surface of the paint with course sandpaper prior to application. Then, as Barbee6043 says, cover the area to keep it moist with the product until it lifts.