That really looks slick. I can't wait to see the other side done now!
When I did mine, I believe I waited too long to apply the "sprinkles" because the first time I swept it out, at least 1/2 of the "sprinkles" blew away. I now wish I would have just purchased more of the sand traction stuff instead of the sprinkles, because it really makes it non-slip and more uniform in color. The downfall to that is that every speck of dirt will show up, unlike the "sprinkles" which camouflages the dirt.
Also, where did decide to stop the paint at the roll down door? I'd like to see a picture of it if possible so others will understand the different options available.