I'm trying to fix some spots on my rocker panels.
I sanding it all down, to bare metal in spots, cleaned it all up and primed it with a filler primer. Painted it all nice. Then a few days later I noticed bubbles in a spot in the paint. The paint was lifting in one of the spots that was sanded to bare metal. I sanded it back down... to bare metal and shot filler primer on it last night then let it sit over night. This morning the bare metal spot is showing signs of bubbling again.
Do I need a sealer primer before or after the filler primer?