The original porcelain faceplates on the pump I'm restoring are in fairly good shape except for a few surface rust patches, mostly near the edges. No amount of polishing, chemicals, soft scrub, etc. will remove these patches without harming the porcelain.

I am tempted to try some sort of paint on these areas but I can't imagine it blending in or looking good.

So .... has anyone successfully cleaned/painted minor rusty areas on faceplates with good results?