If the rust is very light, I would try any brand of metal polish, or wadding polish from an auto parts store. If it's more stubborn than than, maybe some 800 grit sandpaper. Try to stay away from wire brushes as they may scratch the surface too deep.
If the rust is only skin deep and not "bubbles" within the skin then use "Never Dull" on it. I use it for all types of exhuast systems, tips, mufflers etc. It works great. Be sure to let it sit for a few minutes on the COOL metal before buffin it off. Good Luck !
Tarmac Terror and Xero are right on target. If it's light surface rust on stainless (which is possible) then polish is probably your best bet. If it is deeper and you need to use fine grit steel wool, always follow up with the stainless steel polish to make sure you won't just form that corrosion again in a short while.
If it's Chrome light surface rust can be handled with aluminum foil (crumpling the foil helps sometimes too) the aluminum is softer than chrome but harder than rust. Then follow up with Chrome polish specifically. Chrome is thin, If you're getting pitting or deep rust you may need to get it replated. A small to medium size part shouldn't cost too much and you can just bring it to your local plating shop.
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