I wouldn't blast anything oily with solid media especially if it is a recycling cabinet, you will end up with clumps.

Be aware that soda blasted parts need some sort of after treatment if you are going to paint them as the paint won't stick for very long.

As for moisture, having a second tank helps cool and pull moisture from the air. A refrigerated dryer is great but $$ . If you have a large compressor pump, more tank reduces the number of starts. If you have a small pump, this gives more blast time before you out run the pump.