The dry ice blasting is all the rage on BaT now. All the dealers do it, taking off the protective factory wax coating on the engine case and transmission and all the aluminum suspension parts, and the uninformed are just gobbling it up. No way to tell if there are long term leaks, such as a slow oil or transmission leak. Oh well ... I am all for making an engine look good from the side you see, but if you have to get it on the lift to see your car's bits be clean, that's taking it a step too far.
Reminds me a little of bleached teeth nowadays. My kids think their teeth are yellow (perfectly white), but everyone else is bleaching theirs, especially anyone on the news or the instagram!