Re: colour coded bumper inserts
My Alfa Rosso red 156 looks a lot better with colour coded bumpers now. I had mine done a couple of years ago when the bumpers needed respraying anyway. And since I needed a new front bumper at the time, I also took the opportunity to get rid of the worse-than-useless headlamp 'washers' too. They don't do the required job and just **** away half your washer fluid!
Funnily enough though, I prefer the door mirrors in black and have left them as they are.
PS yes, any good bodyshop should be able to prep the black strips to get them smooth, no probs.