Originally posted by csf03716
duct tape off as much area as possible, start and heat up engine, apply oven cleaner,spray & brush, rinse off follow up with lacquer thinners on a rag, but ideally as you know the ultimate would be off the block.......
yep I've tried that but oven cleaner will burn and pit the aluminum I did that once ended up painting it So yeah you might as well just take it off and do it