Standox has value shades that should help with coverage.You have any old reds laying around you can put down first?
I certainly can do that.You "should" be able to do it with that. 48oz roughly RTS, 16-20 oz per bumper, 12 oz for the fender. Definitely enough if you supplement with the Standox on your last coat. A lot will depend on how well it covers with that color. If it covers well then 48 oz RTS will be plenty. If not you may have to spray a coat using the Standox. Why not get 40 oz of Wanda just to be on the safe side, and save money over using any Standox?