Do ask what's involved in the vapor blasting! The name implies or gives the impression it's just water, but in fact usually involves sand and water. One of the 90S guys here in the states sent parts over to England to have them vapor blasted thinking it was the best way to go, only to have the engine fail prematurely due to contaminants.
So be wary - and do inquire how it's done. If they won't tell you, assume sand was used and do a very thorough cleaning!