At my favorite O'Reilly's auto parts store, I picked up a tube of Mequiar's Wax for white cars, they also have one for black as well. Washed and waxed with it and found it to impart a much deeper glossier shine. Tube was $11 and was enough for two wax jobs. I know everyone has their favorite wax, but for white cars this wax seemed to look better than usual premium waxes.