rollers

Fellow sailors/boaters, any suggestions on the best roller for oil/alkyd based paint? I used one a few years ago (can't remember which) and I didn't have to tip as the paint was nearly perfect. I used a foam roller last year and it created the usual bubbles. Any wisdom appreciated!

I have a 1983 Hunter 34. There are three blocks on swivels at the base of the mast, each with a cam cleat on the bottom. The line comes down, around a tiny sheave or roller, around the main sheave, and then through the cam cleat. The problem is that on all three of them the little roller or...