It will work well for dry tumbling with corncob/walnut in my experience, but I couldn't say how well it works for wet tumbling. A quick perusal of the MSDS indicates that it is water soluble, so you could try adding a small amount to the water in addition to the usual detergent and Lemishine. I doubt you can improve on the results, but it might offer better resistance against tarnish.
You will certainly not have to worry about airborne silica prticles if you are wet tumbling and the amount of ammonia is not going to harm cases.