I have a question about the substrate I saw on a beautiful sign; it can be seen about 14 miles East of Breckenridge Colorado, in Alma. It's the city (town) sign on Hwy 9. It uses a small uniformally colored gravel for the background. Something that resembles tiny crystals, set similar as a mosaic. SO, has anyway ever used this method to create a background? And how is it adhered to the substrate? Alma sits about 11000 ft in the Rockies, extremely sever weather. If you're ever in the area, you should stop and check it out, it's a real work of art. Thanks for any help you can provide on this technique.
