From a chemists point of view, this is pretty legit. The health concerns raised in the comments section though is also very real. For the exact same reason you need a respirator when you sand blast, aerosolized SiO2 can cause immense damage to your lungs.
but handled properly and IF its as plyable as they say, this could be the new coating of the future for frames and tubs, although i doubt it handles flying rocks and debris as well as a good thick layer of POR-15 or the like. Keep in mind they were talking about a layer only a 100nm thick. A pebble could pretty easily break through that small of a layer of what is essentially glass.
1985 CJ7 Project
Phase One :
5.3L Vortec/4L60E, Moser axles for AMC20, Twin Stick'd Dana300 - Completed
Bedliner, Rollcage, Seats, BESRK Rear Bumper w/ tire swing, Soft Top, and a few other goodies - Mostly Complete
Waggy 44 front, Scout D44 Rear, 4.56's, ARB's (F/R) SOA with YJ Springs, 35x12.50x15 BFG MT - Not Even Close to beginning
Also a mostly rust-free 1970 Scout 800A That I'll get to start working on someday...
Chrome won't get you home...BUT Rattle Can Black may just get you back"