Primer

I’m repainting some steal bulkheads. I removed loose flakes and Sanded with 80 grit disk sander. Wiped dust off with damp cloth, let thoroughly dry and applied one coat of primer. Then I get some of this bleed through. Why? What am I missing?

thank you for any help.

IMG_5230.HEIC https://drive.google.com/file/d/1JzldsAAaT3CM4Y2I5LP8nXBX-WURLlU2/view?usp=drivesdk

 

What primer did you use? Were those rust nodules left after you sanded?

 

Use a primer designed for that purpose.

 

You didn’t say what your “damp rag” was wetted with, water perhaps?
Use a compatible thinner or solvent for wipe down.