I've been trying to decide which way I'd go with sandblasting various moke bits and
just last week decided to build a cheap unit as it wont get used that often and i have better things to spend money on.
My unit consists of a gravity feed gun, it has a small tank on top that holds the garnet,
it cost $39 from Trade Quip agent (supercheap have a similar one for $49)
I brought $25 of garnet from local sandblaster man (about 20 litres)
then over the weekend build my own cabinet using one of those clear/white plastic tubs
I got a 100 litre one but supercheap had 130 litre for $24
brought some thick rubberish gloves from TQ agent $3.50, cut holes in tub, cut holes in wood, screw gloves to wood, seal with door seal, screw wood to tub, cut hole in lid,
sit bit of glass over hole, drill hole in bottom rhs of tub for air hose,
Took less 2 hours to make and less than $100. already have 15cuft compressor.
No need for inside light as tub lets it in, and no need for vacuum to suck out dust.
Havent sealed the glass or lid but not too much garnet excapes
The tank on the gun is a bit small, takes 2 -3 refills to do one side of brake backing plate.
I very happy with it so far, of course not as good as the bigger tanks/ cabinets but for the amount of use it will get I think its great value,