Originally Posted by Zorin
Again, thank you and I am aware of how to cut out rusted area.
As to primer, I am using Tremclad Primer. My question is more about a chemical that can be used in tight places with small surface or sport rust.
Since you know all that, why are you asking!? Go to any body shop and see if they use anything else then cut/grind/sandblast/acid bath methods...Anthing else is pointless, the cancer will always come back...
For your project a small sandblaster will do the job...