Well, you can see the results below. The three labels pictured were all created and put into the garden in Spring, 2009 and remained there, so they've been exposed to two Springs, two hot Kansas Summers and one very cold Kansas Winter. The urethane coating did decrease the fading, but there was a drawback, as you can see in the third picture; at some point the urethane flaked off a number of the labels leaving them worse than before. I'd say about 50% of the labels look like the first picture at this point and the other 50% look like the third; or worse. We'll call this experiment a gigantic fail.
|Coated Label at 1.5 years|
|Uncoated Label at 1.5 years|
|Oops; flaking away...should say "Buck Rose" at the top|