i just did a soda blast on my 34's. I had grabbed a set of xs750 carb tops, polished them up, went to pull my carbs out, but apperantly, when I rewired my chop, I ran a bundle of wires between the sync screw, and the fuel tee, making removal impossible.
So, with carbs flopping about in the frame, I put the new to me polished carb tops on, reinstalled the carbs, put my unifoams back on, and soda blasted from every angle i could, hosed it off, and when for a ride to dry. Started funny from water in the foam filters, but quickly dried out. no harm done blasting with carbs on the bike, carbs are now clean, and raw alum.
Looks good to me.
I would post pictures of before and after, but my cell phone dosnt show the affect very well.