If nobody sees the prep who's gonna know what rub you use and to be honest they wont ask. Even if some one does all you need to say is "it is a propitiatory process and there is some salt involved."
My choice for commercial Rubs
McCormick season all & black peppa & chili powder> Pork butts & chicken
Slap yo Momma Caujin seasoning with a little sugar>Ribs & chicken
Montreal Steak seasoning & Woster peppa> beef
I'm a Proxy Vegetarian> Cows eat grass & I eat cows.