Pretty much finished (or grew tired of) #1 cyclinder, so I cleaned it well, flushed the ring area with copious amounts of carb cleaner (need to get more tomorrow) and sprayed it with lithium grease.
Tried to get the Dowel Pin out of the block, and it doesn't want to play. The one that stayed in the head came out easy enough.
Moved to #1 at DTC, and started on #2:
The razor really gets into this buildup, whatever it is:
It leaves the surface fairly nice, without removing metal:
I don't like the erosion on the head. The sleeves in the engine seem to be just slightly uneven with the aluminum water jacket. I need to study head gasket designs, but I think the aluminum inner ring on the gasket is supposed to crush and seal with the cylinder sleeve. I seems to have eroded away to the water jacket aluminum part:
Man, that gasket material is tough to remove! Finally decided to call it a night. After three straight hours at it, my hands are getting sore. I'll order a new dowel or make one, because I had to destroy the one in the block removing it so that I could check level. I'll probably get the surface block down tomorrow night: