there's stuff in a can called "chisel", i think it is made by permatex, it is a spray on gasket remover. it works good for removing paint. sprayed it on my car once wheni was prepping for paint and it it took the paint and primer off, right down to the base metal. do not get it in your eyes or on your skin.
Thanks! (more text added because "Thanks!" is too short for the bulletin board configuration.. : )