everyone is too scared to ruin a lovely gun and this would only really only work well with gbbr or gas pistols as aeg's will just break under any water or bad conditions
Tbh, I can't see anything terrible happening so long as you take the time to properly clean it out afterwards.
I'm just not prepared to have to do that. Otherwise I'd try it.
Also, since I clicked the link from an airsoft forum, when he actually fired it at the end I shit myself, 'cos I'd not been paying attention at all and thought it was an airsofting gun rofl.