Its going to be very difficult on a white XK especially since you're not as OCD about it as I am, not criticzing but it if you were to paint your bumpers, they would be a diffrerent color than your whole XK, unless you did a complete clay, compound buff polish and wax with it. Also a cheaper way to go is buy compound and do it yourself. If you want Ill walk you thru the steps, it would save you $$$ but take some time and elbow grease.