If it's what I think you are talking about it's just pour on epoxy resin, basically the same as the bar top kits. Yeah its pretty cool stuff.
I don't know what your version costs but theres a cheap alternative too if i can remember enough to find a link i'll post it up
Ah should have known, I get almost everything resin or fiberglass related from this retailer
http://www.uscomposites.com/kk121.html
Works the same way as ArtResin. It's about a third of the price though.
You can't go wrong with uscomposites
They do a great price on everything.
Epoxies are pretty much safe over anything.