The telltale signs of a bad spray-paint job are easy to spot. Stripes of uneven coverage, paint buildup in the corners, a stray hair in the finish—the list goes on. Worst of all is the dreaded ...

First, move the spray paint cans to a room with a temperature above 32°F (0°C) and let them gradually thaw. Avoid using direct heat sources, such as hairdryers or heaters, as rapid temperature ...