Heh, Heh, heh. Took me a week to strip off what was left of my cylinders' gasket. Many's the evenings I could have wept in frustration. In the end it was just stripper (paint) long blade from stanley knife and patience by the barrow load. Never use the point of the knife, always draw the edge of the blade along the top at a shallow an angle as poss.
Enjoy.