Just thought that i would post that most carbs arent even made from aluminum but actually Zinc.
Also I have recently found a new cleaning/polishing process, using common ingredients. Makes the carbs look OE. I do not use this method on any sliders or jets/needles as it does slightly make the surface rougher. See
http://www.aircooledtech.com/tools-on-t ... a_blaster/ for full details. When you are done blasting the carbs out, you can see the green/yellow color that zinc makes when it is fresh. I also made a blasting cabinet from a plastic bin, with a plexi window in the lid and i used old long sleeve shirt sleeves wired into access holes to act as filters and access. I will try to rememeber to post some pics of it later.