Hey I'm a new kid on the block and still sussing stuff out like protocol and stuff, but is that something like a hydro-blasting , or soda (sodium carbonate)blasting ? the former I had front hub done and it seems fine for now, have seen another hub ,been sitting at the wheel shop for a few years, looks like it was just done. My mate Kel who does a lot of rest work and is meticulous has a his stuff done by the same guy.
A process that I've been led to believe a certain R.R. (fancy 4wheel maker) uses. Other than that,don't know a lot,except I think it's bead blasted and then water vapour blasted, which seals the alloy pores(and I'm only talking about aluminium casting for now)
Cheers duTch