You Must have read my mind. I dropped to 120 to knock off the blue paint. I thought I was doing a good job until I saw what the guide coat left behind.
Besides the obvious that guide coat shows the faintest low spots (and there a plenty of them). I'm trying to figure the best way to approach this. I'm thinking fill the larger surfaces with a 5" and 12" spatula, let those spot harden. Then kiss sand those and try to feather in the areas that need a tiny amount. I'm going to try an experiment first. I've taken a strip of counter top material (Formica) and fixed that to my 24" hard foam sanding block with two sided tape. The theory is It will flex enough to fill without overfilling. Since That block is what I'm using to sand with, I thought this approach has some merit. We shall see. I'll post pictures of the test as I go.