> The paint is also being perfected and tested to ensure it can resist dirt and can last as long under UV light as commercial white paints. Having stored some

> The paint is also being perfected and tested to ensure it can resist dirt and can last as long under UV light as commercial white paints. Having stored some old closet doors on the porch near a small urban road for a few months, this was my first thought. The grime that accumulated from exhaust was incredible. (There were leaf blowers running across the way a couple times a week, so I'm guessing those were the main culprit.) Things turn dingy in the city remarkably fast. Cleaner cars and elimination of two-stroke engines will help, but for now I think that for most exterior uses, "resists smog" will be more important than "starts out very white" unless you clean it frequently and thoroughly.