My first paint job was on a '56 Chevy back in 1966. It was early March in Indiana; I was a senior in high school. I got up on a Saturday morning and while I was eating the breakfast my mother had fixed, the guy on the radio said "It's 33 degrees in downtown Indianapolis". I figured that as long as it was above freezing I could paint. I already had the car ready and I was young and dumb and determined. So.., in an unheated garage with a diaphram compressor, a $15 sears spray gun, and no ventilation, I sprayed a gallon of '66 Corvette Nassau Blue DuPont acrylic lacquer ($18 per gallon) on that Chevy. I used "fast" thinner ($1.05 per gallon), moved fast, and allowed extra flash time between coats... It was one of the best lacquer jobs I ever did. It had a great shine, no runs, and I didn't have to buff it. Talk about dumb luck! I have pictures of the car - it turned out beautiful.

Since then I have painted in all kinds of situations including some small pieces outside in my back yard. A lot depends on the type of paint you're using. Hotrodpaint is more knowledgeable than me - I have been out of the trade for about 6 years and modern paint products are changing rapidly. One thing that is still the same; the faster a paint flashes or "dries to the touch", the less likely you are to get dust or trash in the surface. That may help determine where you want to do your painting.