I have used wet ceramic quite a bit!
Assuming you have a rotary tumbler that is rated for wet use it is a very effective way to clean brass.
I have found that you have to leave a lot of room in the tumbler to work properly.
I would run a third of brass or projectiles to two thirds media and the tumbler
no more than two thirds full (any more and the media would come out gummy from the inside of the barrel).
I tried this set up out of desperation, I bought out the entire inventory of a long time high power shooters stash of components that were not stored properly,(tarnished really bad)
The corncob in the Dillon vibratory did not touch the tarnish on the projectiles.
I already had a Thumlers tumbler and decided to get the ceramic from Cabela's along with the solution they sell with it.
The results were great, the projectiles came out looking brand new!
However the extra work involved dealing with the liquid and having to dry it all just makes for a long day.
I just use corncob in the Dillon for 95% of my cleaning projects it is much faster and way easier.
Rich