Respray and colour change: UK vs US vs Germany

Paint is one of the few modifications that is purely administrative. There is no technical inspection in any of these three markets, no emissions consequence, no safety equipment involved. What all three want is the registration record updated when the main colour genuinely changes, so the vehicle still matches its paperwork, which matters for identification more than anything else. Germany states the useful boundary explicitly: touch-ups in the same colour and partial paintwork without a colour change need no notification at all. The single technical constraint shared by all three is reflective and mirror-effect finishes, which can dazzle other drivers and are treated as a lighting problem rather than a paint one, along with painting over lamps, glass, reflectors or plates.