stainless polish

[drake1271]

I have yellow staining In four spots on the bottom of my flu's and in one spot it has pitted through. does anyone know what i can use on the other spots to stop the corrosion? like polish??

[WF MASON]

The spots(the spots only) need to be cleaned up and soldered, leave the rest of the pan alone and DON'T scrape off the soot, leave it be to protect the rest of the 'spots' you can't see.If you can see four there are more you can't see in places that are almost impossible to clean and solder. It could be caused by bad stainless or the coating is scratched off in thoses places and rust has set in, or burned thin with use.