Has anyone here got experience with the stuff? I'm not that familiar with it, and its usage. Even after stirring, the stuff's pretty thick, and it messes up the brush that's built into the jar! is it really like that, or do you thin it before using it to mask your models? And do you really HAVE to scrape it off the model, or is it peelable like other liquid masks I've read about? Any help would be really cool! :-)