Well, it's not fisheyes. These are definitely bubbles. Prep work should have eliminated any contaminants. 1)Sanded to bare metal 2)Primed with Rusty Metal Primer 3) Wet sanded 4) Wiped down with mineral spirits.

I've applied 3 coats to the hood, one fender and gerry can. No problems on first two. Millions of bubbles on third. Also painted the cowl and sides (first coat) at the same time. Bubbles everywhere. It was sanded down to bare metal, washed with soap and water, wiped with mineral spirits, then painted (no primer). So it's the same paint, same mineral spirits, same rollers, same roller pan. This is what baffles me. Even when I blow the bubbles out they don't flow together. They just look like flattened bubbles. Definitely a head-scratcher to me.