Kokanee

If you are going to be printing in PLA then you will be absolutely fine. Just don't print in ABS, hell of a stink! www.cmu.edu/ehs/fact-sheets/nanoparticle-safety.pdf

You totally explained yourself just fine! The hairspray trick was something I learned with an upgraded glass build plate in my old makerbot replicator 2x, and just carried it over to the UM3 successfully. I have not had a single print come loose from the build plate so far, and I'm pretty sure I've surpassed 50 prints easily.

I've been using hairspray on my UM3 print bed since I purchased it last month, and nary a problem with bed adhesion.