I finally quit chasing pin holes with filler and used a razor blade instead
Kept getting these tiny pin holes showing up after sanding primer on a 2011 Silverado bed side last month, and re glazing them just made more work. A guy at the parts counter in Tulsa told me to drag a razor blade flat across the wet primer and it pulls the filler into the hole instead of smearing over it. Did both sides in about 20 minutes and the primer laid down clean the first time. Anybody else do this or am I late to it?