Oh absolutely.
A friend of mine used to make some vids for this "specialist" market, and I was in a couple of them. Was all totally non-sexual and fully-clothed, but there was something slightly surreal about being sat in his back bedroom with a couple of other guys chucking buckets of stuff over each other.

He gave me some of the powder they use to make the gunge stuff to take home with me, but on the way back that evening we decided to pop into a local bar, where they do bag searches on entry. It was at this point I realised that going in carrying a plastic bag full of a suspicious-looking white powder might not end well. I stuffed it at the bottom of my bag and thankfully they didn't notice it. It'd have taken a hell of an amount of explaining otherwise.
(moogal has eggs, Mon 10 Aug 2009, 15:44, 1 reply)

Powder
Yeah, that's the 'natrasol' I was referring to. It's a methylcellulose food thickener. I think they originally chose it as gunge because it looked right but was also edible if some accidentally got in the mouth.
(calamarain just invented dehydrated water, Wed 12 Aug 2009, 17:41, closed)