Alex, I spoke of real world experience. The material is somewhat UV stable, but Alsa won't admit to it because the lab testing was not done at the time we tried it. Not the best result in direct sunlight, but in two years the samples we made faded slightly and became measurably harder. Still okay for auto interiors IMO. It won't mar unless you use a very rough fabric or material to clean it with, or try to scratch it with fingernails. It will resist most cleaners.