I knew that if I printed a sign on adhesive vinyl it instantly became waterproof due to the way the ink permeates the vinyl and a chemical reaction that occurs. So why shouldn't I give it a try outside and see if it would hold up under bright summer sunlight at a busy intersection where there are no trees.
It didn't...the fade was dramatic and traumatic to say the least.
So onto the next thing....I'm going to try a spray called Frog Spit. I've been told it works great and sprays a UV proofing coat over a printed item.
I'll let you know how it turns out!