I recently took the heads off my car and took them to a machine shop to get them milled. I will be replacing the head gaskets and would like to know the best way to get the head gasket material off the block. Every where I have read seems to have conflicting methods from a razor blade, scotchbrite pads, 3m discs on a drill and but then for every method theres someone saying its unsafe. I have all the oil ports blocked off and have been using a razor blade and it does a good job of getting the excess material off but I can still see black rings of material around all the ports. I cant feel them with my finger but they are still there. Is it important to get ALL of the material off or is it ok if I can't feel a difference when I run my finger over?
Thanks!
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