If Joey uses Calcium and provided he wouldn't apply calcium with track surface being way to dry when calcium was spread , which I highly doubt would happen, because he understands it requires a lot more moisture before calcium than most . So provided he uses Calcium and it's a somewhat Sunny day , 67 * or higher temps , you can pretty much count on 1 of 2 things happening track grips up really good , tire needed would be a No Prep , Never prepped 33 , Difference in Good Choice to Best Choice would be AGE , OR Track comes in two quickly and Seals over ( Moist Slick ) but lacking grip, Then it's a Prepped 33 and what you mention above with the Black sand being part of the mix would not be any where near Aggressive enough , I'm not familiar enough with just Trac Tac products to name which one would work best for sealed over , however I do know when sealed over mutable coats of Andy Murry purple works well , So which ever Trac Tac prep compares closest to Andy Murry purple should get the Job done .
Now if your questioning how do I know if it's sealed over , Shoot me a PM and I'll answer that question .
I apologize to Chris and Randy for mentioning another prep brand on there thread , but in this moment I don't know how else to explain what I know worked last Nov when we were there .
Dis Claimer not because I think it's a bad product , I don't even like Andy Murry purple , " WHY " I just have Never had any luck using it ourselves.
Good Luck !! hope this Helps