You can bead the outside, but I would not bead the piston bores. The seal groove must be absolutely smooth to get a proper seal. That includes the part of the groove you cannot see. The seal groove in these is not square, it is ever so slightly a V. This, strange as it may sound, is what retracts the brake from the rotor when you release the brake. A scraping tool, or perhaps a tiny wire wheel on a Dremel will do.
The irony here is that SSBC's original business was rebuilding OEM calipers, with stainless pistons. Hence the name. Then they started selling conversion kits, and after a while I guess they decided all that grubby rebuilding was no fun so they stopped doing it.
Amateur restorer. (Well, once in a while I have been paid for it)
Last edited by 22GT; 11-11-2012 at 08:02 AM.