A couple of alternatives to re-chroming the light reflectors:
This fixture is from a Triumph TR6. The owner placed reflective tape on existing fixture. Looking closely at the picture you can see reflections in the tape.
Another alternative is to go LED. Doesn't use the OEM reflector and turnsignal and brake LED power is 5W vs 21W bulb with 3x more light. Yeah, I know, a shameless plug.
