Love slick sand, evercoat triple cut compound works pretty good for the money, a lot of their filler is decent and they have a whole lot of other products that work pretty damn well also.

One thing about the slick sand, reduce it. It's much easier to reduce it down, put a few more coats on, and have it lay down nice and smooth then trying to spray it unreduced and full of orange peel. Sanding time will be GREATLY reduced as will drying time.