One of the worst problems for Hobbyist Painters is dealing with off season painting. For some of us it is the extreme temperatures in the summer and for the rest of us is waiting too long in the fall and watching the thermometer drop below optimal temperatures.
I have heard a few people describe how they painted their vehicle in an attached garage with the door open to the home and a fan blowing the last cubic foot of warm air into their garage.
Other people setup oil coil heaters with no open flame heating their garage …

When working on spot repairs or overall paint jobs the painter must allow for proper flash and cure times between coats of the same product and primers and top coats.
A few years ago body shops started tinting the color of their primers to match the color of their top coat. The more people that you ask about this practice the larger the number of answers as to why or if it is a good thing to do.