Hi There JP,
Relative to cleaning, polishing up the carbs: If you have a bench mounted or whatever grinder with a polishing wheel on it; That should be just fine with a couple of compounds (Semi-Rough to take out scratches & a Jewelers Rouge (What I used) to finish them off.
If you "Don`t" have a Buffing machine; You may try "Never Dull". It takes a bit of time & several hits before you get the desired finish but Its an "In-Expensive" way to get a "Decent" finish.
I`ll send you a pic of two of mine finished via a "3/4HP Baldor Buffer".
Russ