what
oneviaman suggested is what you would usually use in a mech shop. just make sure you get the right one. i can't quite remember but i think the yellow one is for alum. and the blue one is for steel or cast iron. or other way around. use the steel one on alum. and u will start removing material that you want to keep. and i usaully spray brake cleaner on first and then hit it with the brush. the gasket remover does burn the flesh. so i don't use it if i can help it. dude that stuff hurts. stay away from the cutting disc muahahahaha
john