Yup, just regular old water. I got myself a big load of purified water when I first got my airbrush, but rarely find myself using it. I'm one of the messiest painters you'll probably ever meet. It freaks me out seeing some of the amazingly clean environments other painters work in, and how they have all their equipment pristine the whole time. I mean, my airbrush is really good, but even that is splattered with paint and whatnot. My Windsor and Newton Series 7 brushes I got - trashed! I guess we all have certain ways of working that we are at our highest functional peak in. Mine is disorganised messy chaos!
I used to mention being featured in the blog on my eBay auctions, but I got email contact from their legal department. They asked me to not link to their page, which is fine and I don't. They also said I can't mention that I'm featured / have been featured, which is utter nonsense and utterly unenforcable. But, if I do keep on mentioning it, they could get pissy and stop putting my stuff on the blog, so rather than loose out on that potential audience then seeing my things on eBay, I play nice. So, watch out for their crazy legal bods!