Marc,
Actually they are protein and they are already cooked; kinda taste like chicken.
Couldn't resist.
Screen sounds OK for the radiator but I've never had very many there and don't have a screen.
As for the paint, the trick invented by my wife is to cover the front with soaking wet towels - let'em sit on there for an hour or so. Then the bugs just wipe right off! Naturally you need to do this within and hour or so of finishing the ride before they turn into concrete.
Tom