There's two ways of looking at the question.
Which colour chips easier.
Which colour shows up stone chips more.
You need some black colour magic, car will look like new after 2 coats of that.
I must have about 5/6 bottles of the stuff. You can hide a multitude of sins!! lol.
the turtle wax black polish stuff? Or the thick polish in a squeezy tube (like toothpaste?).
I use both of them and a chip stick on a door scratch and it does help, haven't tried on the bonnet yet, no sense washing the car just to drive 500 yards to be caked in crud again!
Oh and what's the point in wiping your bum? It's going to get dirty again. Right?