The body scrub I use!

I expose my elbows and the like in the summer, and I don't want them to look unsightly white, so I use this about twice a week (I'm not sure how many times I should do or if it's gentle). It has a texture somewhat like brown sugar, so when you rub it on your skin, it removes old dead skin cells and leaves your skin shiny, so I always use it.

How many times a week should I use a scrub?

Is it okay if I just do whatever comes to mind?