Just a few picture updates for now, got some garage time to do more paint prep. Oh, the prep, the most important stage and the most tedious. Etch primer next, a light sand then on with the color. I took most things down to the bare metal just to get ride of a lot of junk buildup on the base.

I got a lot of priming to do... you may notice that the pulley has 3 grooves. I only need one. I tried to fit the pulley from my B18 onto the B20 in the hopes that it would fit, but all it did was bind up when tightened. A bit of a head-scratcher, but i haven't gotten back to it yet. So in the meantime, I'll go with what worked before. I would like to save a couple pounds of the crank eventually, though.

The below picture doesn't do it justice, but this part was quite grimy with paint and hardened sealant. I thought about just leaving it as is, but it's there, I'm here, so let's just get it done. The other side is more or less prepped, just another light sand then on with the primer.
Before:

After...

Hopefully in a few days I can get a shot of primer on. I don't like to leave the bare metal uncovered for too long. Will post the pics as they happen, or as I remember to take them.
