Feel kinda dumb not fiqurin' this out, but I'm having trouble removing carbon build-up on the INSIDE of my 216 pistons. I've scraped and power wire brushed them ,but really can't get in there for a good cleaning. My local machine shop doesn't want to glass bead them either. I think it's just bad timing for his one man operation right now. Any other suggestions as I'd like to keep moving forward. Thanks.
