I was so proud of myself. I stripped my front door of layers of bad and cracking paint from the previous owners (it was like stripping bubble gum), sanded, bought a high quality primer and exterior latex paint, as recommended by my SW paint professional, painted it about 6 months ago (2 coats of primer and 2 coats of paint), and the door is now bubbling in the Summer heat. I'm in Vegas, with regular 110 degree temps, and the metal door gets extremely hot in the afternoon direct sun. Wh…