First off, I should state that I hate doing bedding jobs. I don't do it enough to have it down, so I'm always nervous. I have a couple of stocks that I bought used that need rebedded. I don't know what material was used for the initial job on either one. My thought is to grind enough out to ensure a good skim and rebed. Do I need to worry about material compatability? Can I get away with not removing all of the old material? I don't have a mill, so I guess I'll be free handing a dremel, unless anyone has a better suggestion.