There was a discussion of that on another forum, the reviews were favorable, but the 2 things to watch out for were that you had dry media and a strong enough washer.

 

Just arrived tonight. Hopefully I will get some time over the weekend to try it out. I will report my findings and post some before and after pictures.

 

I've read that need keep sand hose on top wand so if stop blowing water want feed back in sand hose then clog up. Using play sand stop one up big pieces sand. A 1600 psi washer want work pressure to low 2500 to 3500 will work. Take 2 people if use 5 gallon bucket wet damp sand want work, back off from work piece said sand hits metal hard up close.

I use single stage compressor 2 piston so maintain 125 psi while in use with pressure washer at 2650 that should blast faster I've read sand bounce a long ways no dust.

 

This sounds really good to me. I wonder about abrasive wear on the parts like the wand? Anybody used one long enough to see significant wear? I'm thinking about how fast steel nozzles wore out on my dry sandblast cabinet. I went to a carbide nozzle and stopped that, but still have to make a lot of the throat inserts to keep it going. Maybe the water reduces wear?

I think I'd want REALLY good goggles, too.