[stratoblaster]

I would definitely trust the shop, assuming you're not using Earl Scheib or Maaco. If so, then thats a completely different thread. If the guys at the shop are comfortable with some brand, don't make them shoot something they're not used to. Right now, they are comfortable with the mixing ratios, flash times, and the spray pattern of their product. If you introduce something else, they will be experimenting with your paint job since they are in uncharted territory. Like above make sure it is a good polyurethane and you should be OK. I assume, you are already trusting them to prep and shoot the car, you may as well trust them with the product selection.