I have a chance to get into a paint booth this weekend. The forecast is calling for rain all weekend. Obviously I'll be inside, but will the wet air cause problems? Should I postpone?

 

It won't cause problems as long as it's a good sealed booth.

 

if anything will help keep the dirt out of the air

 

actually humidity can cause your clear to dye back even in a booth..i paint 35-40 cars a week in a nice down draft and on super humid days or rainy days the clear sometimes dosnt come out as shiney..the clear will trap the moisture...it wont hurt or ruin anything,a good trizac sanding and buff will slap the shine back on haha..