Chris,
One of the hallmarks of a high-dollar/high-end paint job is the inability to tell it was repainted. When you refer to "mudguard" are you referring to the rear fender? You don't list your year (although I doubt it matters) but I'm fairly certain all R65s (US market anyway) came with an unpainted black plastic rear fender. If your rear fender matches the paint on the tank then at least the rear fender has been painted and most likely the entire bike.
Don't sweat it, if you like it be happy that your's stands out from the herd!