Removing gasket from AL heads

Single edge straight razor blade and be patient. I wouldn't use purple power on it. I did scrape the red paint off my ProMAXX heads with both plastic and steel blades as well as paint remover to soften the paint. I wouldn't use brass or stainless brushes that have any stiffness to them, plastic brushes are OK. Maybe some 000 steel wool to get the small bits at the end.