Machine polishing is a benefit for any color car, some colors just have the ability to reveal more depth than others do. I've seen white cars that look incredibly glossy though (hi Andrew!!) and others that are a swirled mess, which seriously detracts from the appearance (uh, hi Justin - sorry buddy).

As a matter of fact, I'm about to shoot a PM to Justin to see if we can get together soon to do a serious machine polish on his car so that I can document the process for you all.