My friend has a VW Jetta with a Magnaflow cat-back exhaust. He hasn't washed the thing in months
and the tips are FILTHY. They're caked with carbon and have rust spots even though they are 304 stainless.
I have Meguiar's M28 Metal Polish, which works well, but what should I do if the metal polish is not aggressive enough to remove the rust spots?
Can I use some sort of Scotchbrite-type pad?

I have Meguiar's M28 Metal Polish, which works well, but what should I do if the metal polish is not aggressive enough to remove the rust spots?
Can I use some sort of Scotchbrite-type pad?
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