1st ask yourself 1 question....and this applies directly to how much work you want to make for yourself...do you want what you are painting to be something people notice but don't go up close to look at...or they look at at a 10 foot or further distance...or within a few feet up close?
After looking at the rear fender guard and determining that even with a nice looking cut, people really wouldn't notice it I'm thinking of abandoning this mission. But the intel was helpful as I might color my dual headlights at some point this winter.