Here's how I got in trouble: I started out with the trunk lid, and it did pretty well, so I thought I had it down. Too cocky, I guess. However, after I did the hood and doors, everything pretty much went south.

I'm using Sherwin Williams products. The temp range for the hardener (UH-70) is 70 - 100F. The temp range for the reducer (US-4) is 75 - 95F. I use my exhaust fans to draw air-conditioned make-up air from my house into the garage, and the house runs about 73 - 78F. I run the A/C in my garage for a couple of hours before I start painting. The temp sure won't hold stable at that temp because of the amount of air I'm exhausting, but it stays well below outside temp.

I didn't have a thermometer in the garage, but I'm guessing the temp was a little over 80F. It certainly wasn't anywhere near our high today of 90F. My products are right in the middle of the temp range for my conditions. However, I may pick up a slower reducer (US-5 , 80 - 100F)on Monday.

I'm pretty sure I just haven't gotten the mixture/pressue settings where they should be. That's my main problem. I also need to over-ride the feds and play with the pressure and the reducer ratio.

Now, I need to find something to practice on - other than the car . ..