My suction gun was only a tenner, plus a bit of post. Spose if a chap had an unsuspecting spare schutz gun lying around it wouldn't hurt, but can't see the point in it otherwise really.
I saw a post saying someone had done this in the last month or so.
I sort of vapour blasted some engine bit's by squirting them with a bead/water mix from a schutz gun, worked surprisingly well.
But a spot blaster is quite neat, it contains and reuses the media.