Like many here I'm always on the lookout for old tools, especially planes and chisels, that I can restore for my own use and enjoyment. Last weekend I found an old seriously rusty no-name plane at a swap meet. It appeared to be complete, all the pieces accounted for, so I figured worst case it would be good for parts and well worth the $1 price tag.
A couple of days ago I disassembled the plane and put all the metal parts to soak in rust remover. The tote and knob look to be in good condition, so I'll just strip and refinish them. This morning I pulled the parts out and started cleaning. Everything looks better than I had actually expected (still no name, just "Made in USA", but it looks like a Stanley #5 copy), but there is quite a bit of rust pitting on the body sides and sole. I think most of that will polish out pretty easily, but there is one significant (i.e., large) pit in the center of the sole, about 2" back from the front edge. It's about 1/4" across and several thousandths deep and would take a lot of polishing to remove. I can and will do that if necessary, but it occurred to me that there might be an easier alternative. Is there any metal-repair compound that could be used to fill the pit and then polished down flat with the surrounding surface? Perhaps some sort of epoxy?