Didn't get to do any lapping last evening, but here are pictures from the 1st session. This is only about 3 ~ 4 minutes lapping, using the suction cup tool thingy and lapping compound. As I say, it still weeped acetone.
I think with a bit more, the valve will seal.
Sure is weird, though, how it went from running like a champ to not running at all. I brought it home from a great dual-sporting trip to Suches, GA area, it sat in the garage for a couple weeks, then I started it up and it was warming up fine 'till I blipped the throttle and it stuck.
