What is the minimum size compressor that's effective?
Depends on what size blaster you get and how long you are going to
blasting (how much air are you going to be needing).
What sort of work enclosure is best?
Something that is totally enclosed with a vacuum system to draw off
the dust so you can see what your doing. Harbor Freight does have a
few small table top units of different sizes.
What kinds of media and equipment (brand names) have you
Sands, garnets, silica carbide, metal shot, etc. = metal removal
Glass beads (about 20 different sizes down to very fine glass
bead dust = very little metal removal, a matt/flat finish with small
sized beads to definite peen texture with large beads
Walnut shell, ground corn cob, special plastic particles, baking
soda/water or CO2 particles (these are special units but each has
some very interesting applications) = essentially no metal loss and
not much texture.
The above (except for the baking soda and CO2 units) are assuming
that you are talking about air blast units. There are other types
but all are much too costly for any of us mortals!!!
I'll probably be working mainly with small pieces of karat
gold, Sterling and perhaps platinum -- as well as cleaning rust
from my jewelry tools (just moved from a beach location).
You might do well to change the blasting media if you take off much
rust from the tools before going to you jewelry or wax, to keep from
imbedding the rust into the jewelry.
Also, for our Master Model Maker, or anyone else, has anyone
experimented with sandblasted textures on Ferris hard wax? It may
be a really dumb idea, and there may be better ways to achieve
interesting textures without embedding sand or silicon carbide in
your wax model. But I've worked with lots of it and, with the
right medium, it just might work....
The walnut shells or plastic particles (balls, squares, triangles,
rods etc.) might be blast mediums that should work with the Ferris
wax and anything that gets imbedded would burn out.
Hope this helps a bit