I've used scotch brite pads on aluminum for gasket removal, just beware of which color you are using, and try using WD 40 as lubricant while cleaning. All should be good. On the valve covers I also used a very thin coating of #2 non-hardening permatex wiped with my fingers to ensure no leaks when completed. Max has access to some type of grease which does the same job, but I'm sure is easier to deal with should the covers be removed again in the future.