I feel like a homo
If you mean the tips, then they dont come off.The 'ikkle hole on the bottom is just a water drain hole.
I think that BMX recommended trying to clean them with WD40. I tried it and it works a treat. My "tail pipes" get a little sooty & dark and it cleans it up no problems
Actually, Solvol Autosol is probably just as good as any of the "posh" metal cleaners, and Halfrauds stock it. Autosol is what all the custom chopper bikers use to polish their exposed metalwork.