Don, if you are painting outdoors, you can probably get away with just wearing an old long-sleeved shirt. If it makes you sweat, it will also absorb and keep from dripping. You should also wear a glove on your spray gun hand (or both if you switch hands like I do). The gloves can also be cloth as long as all they are doing is keeping overspray off of your hands. The main thing is to keep the wet isocyanate catalyst off your skin. After it's dry it's just dust and won't be ingested through the skin...

Dan's after-painting funk may have been a combination of things and amplified by the heat we've been having this year...