Thanks Gav for the advise... I used one at Marks the other day for a pinball I'm restoring. Left the tumbler on for 2 days straight 'cos the metal parts were pretty rusty. I was impressed on how well they came up! Hence why I bought one for myself... Yep, nothing beats a hands free polish!
Got another pinball here that's also pretty badly rusted / corroded, so my new tumbler will get a workout on those parts 
Owen - Check this out re Corrosion...
http://aussiepinball.com/index.php?topic=225.0
That was one of the games from the container. Scrubbed up well - but don't put the rusted parts in the tumbler before reading this. Your media will go black.. 
Thanks for advice Nino. The machine I have here is the Charlies Angels from the same container as the Sinbad, so you already know what I'm in for
Looks like I will be using the rust remover first, before tumbling...
