And then bang your head as you find out you're actually too tall to get through the door!
Believe it or not I'd never seen that before, although I had heard of it. Fantastic.
Re: the type of resin, well I've no idea what the GW stuff is like as I've steered well clear of it, but I guess this stuff is similar to what McVey uses. It seems to have a little give in it, so not as brittle as some.