yes it need to be with in a temp for the paint to certain degrees to work right. you can ask and the paint store when you get your paint they will help you out. also make sure that you start heat up the area before you go to paint because the srrface most be warmer to. good luck
you can get catalyst down to 65 degrees just make sure that the temp on the hardener is close to the temp you are painting in, 72 is the ideal temp to paint in though, goodluck
make sure to heat the vehicle up also , the vehicle temp & paint should be close to the same temp before you start painting.65-75 degrees is sufficient