Solvol Autosol is the best stuff to polish exhaust pipes up with, you'll get them looking like chrome.

However the pipes will go discoloured quickly

Sealey bench grinder, polishing adaptors and some mops and polish, do each section with a medium mop and a cutting compound then swap to a cotton mop with a finishing compound they shine up really well.

Dont forget to use the finishing compound as this stays on the surface and saves a lot of cleaning, the pipes will discolour at the headers but the rest can easily be cleaned off using any cleaner and the re polished with any non abrasive metal polish (autosol etc is abrasive and will dull the pipework off.) autoglym do a cleaner which seems to work well.

These are my TYGA pipes.




I have also done Teen's CBR400 stainless using the same method again shines up great