Originally Posted by tech69
I know it said sanding can happen in 20 minutes but I've never sanded primer within an hour.
It wouldn't "heal" (from what I understand) from that as much as it would simply have solvents that didn't fully flash. But if this was left for a day it would certainly have flashed and sanding it open, though a little too soon would have helped it flash. After 12 hours of cure time before base this is pretty much a moot point I think, I think that is.