How do carb restorers clean the outside of the carb?

Sno Bowl toilet bowl cleaner(dilute hydrochloric acid) will strip a carb down to the raw metal finish quickly and will also eat the carb if you leave it in there too long. I have taken carbs that had water in them and had caused corrosion that this stuff ate out no problem. From my experience with it I wouldn't leave it in there any longer than 10 minutes. And rinse THOROUGHLY.