Hi Kevin, About the waxes… I’m not a casting expert, but wax
melts/burns out. I can see having trouble with other organic,
non-wax models, but differences in the relatively low burnout temps
of various waxes should be negligible. There might be some fine,
hair-splitting difference in the result of a casting, but I think
only someone with “considerable experience” could tell.
I have a SpeedBrite unit mounted on my ultrasonic. I can either
’sonic, ionic, or both. This is different than the standalone
SpeedBrite with its own tank. It really rocks when I do both,
especially when blasting off White-out used as an anti-flux. It’s not
a miracle cleaner, but it does a pretty good job for tarnish and
"crud." It’s also good to know it’s safe for all gemstones when used
with the “Gem Sparkle” solution provided (without the 'sonic
running).
It’s great for touching up sterling chains, and such, which have
tarnished a bit while waiting to be sold. I love to take the unit to
shows where I have electricity because I’ll pull pieces from the
cases during the day and clean them while the show is in progress. It
also helps build good will with other (non-jewelry) artists who drop
by occasionally to beg a cleaning for a piece they wear. 
For a better, and more technical description, visit the SpeedBrite
Web site:
Bit of a disclaimer: I’ve met Jim, the inventor/manufacturer of
SpeedBrite, who has a well-established jewelry shop in Salisbury, NC.
His daughter, a skilled artisan, runs the jewelry operation now,
while he invents new gadgets. Really nice people… and not someone
from outside the industry trying to capitalize on the gullible
jewelry community. He’s “one of us.”
If you’re still lurking
here, Jim, why not introduce yourself?!?
All the best,
Dave
Dave Sebaste
Sebaste Studio and
Carolina Artisans’ Gallery
Charlotte, NC (USA)
dave@sebaste.com