I found out the hard way yesterday (I'm refinishing our downstairs bathroom cabinets) that working in the garage w/ the door open does not qualify as a well ventilated area. I got so sick off the fumes last night I was hurling for a good couple of hours and I felt like crap all night.
So… word of advice when working with chemicals: do it outside — all the way outside, and find a respirator 
I'm dreading the 2nd coat now.
On the bonus side — my refinished doors look purdy.
