Got my first rub brick today, I can’t believe I didn’t know about these magical things until last year, or waited until now to try one. Tested it on the curb/low ledge a few doors up from my house, it’s this ugly rough surface that would never slide despite my fastest most confident efforts. It’s about 25ft long, starting at 5” high and ending a little over a foot. Had it smooth, three coats of rustoleum, waxed and ready to skate in under an hour. It’s such a smooth but controlled grind, I honestly couldn’t be happier with the first test. Can’t wait to turn my whole neighbourhood into a spot