Carl

The bicycle riders use Simichrome Polish (ammonium oleate) to get rust
spots off chrome, etc. I use it as a strop treatment for final polish of
my carving knives and it's great for that. I've also used it to get rust
spots off things like old micrometers and steel rulers. It does a good
job of cleaning the rust out from between the steel rulings without
changing them in any visible way. Use a soft cloth and you should be
able to lift the spots without noticeably effecting the pattern welding.
Probably want to rub the whole surface so any slight differences will be
invisible. Then make sure you re-oil the surface, since the polish
removes all the oil too and leaves the surface primed to rust again.

Jim