OK here is how it went down about 30% sand then it took 2 hours a load. I took an old batch of media that I saved and did them for about 30 minutes a load to get any sand/dirt residue off them. Now I am back to the last step with clean (new) light walnut and they look great. WOW what a pain ! I knew there was some reason to save old media. It may be a good idea to have it to get the initial cleaning on brass picked up after a rain or that may have dirt stuck on it. Then go to the good stuff without contaminating it.
WOW am I cheap.