I bought the mothers mag and aluminum polish and PB blaster today. Do I use PB blaster on the inside parts or just just the mothers mag polish? The insides look really bad and gummed up. It's a little overwhelming for me. I don't want to mess anything up. I polished the head cover for over an hour. I know I made headway, but it still has a long way to go. At this rate it will take me a year at least. I don't think this machine has been cleaned in at least fifty years, maybe never.