[breischl]

>you're going to wash the particulates through a fluid that stays in the pump permanently, so how quickly is the funk going to make that compressor unpleasant to be around?

Yeah, I was wondering about that too. But is the water going to be there permanently?

If the input air is quite dry, presumably (total guess) it would pick up some extra water. So you'd need to supply more. And probably not just tap water because of dissolved minerals and so forth - distilled seems like a better idea.

Conversely if the input air is humid, you might end up condensing water out of it, and need to bleed water from the system.

And then you're dissolving particulates in it either way...

All sounds like maintenance work, but maybe not a prohibitive amount of it.