Last night I pulled out my 4 1/2 inch grinder and a flap sanding disc. I tried this on an old door. It worked well to knock off the rust. I primered it with rattle can primer, then rattle can paint. Looked good with a few swirls.

I am wondering if the swirls can be taken out with another process? Sanding disc with fine (120) sand paper? Hand sanding? Board sanding?

Any experience or advice?

TIA

Dennis
-there is nothing stronger than the heart of a volunteer-