I was in need of keystock and got a good lesson from the machinist there on how they fit them when slots are worn. I'm working on it,...
The varnishers were brushing their way up and around the over 12" diameter new spars. There's a real concentration to it, keeping track of the wet edge, keeping a uniform coat on the infinite angle of the circle, using the light angle to sight back for runs. They make it look easy moving their pails along with them.