Steve, UVIRA (541) 474-5050 is the place to go to get an aluminum coating on your reflectors. This is a better choice (but more expensive) than silver since it doesn't tarnish and reflects almost as much light. Check the archives for opinions. Do not use chrome. Replating original reflectors is better than using reproductions as some of the reproductions have the wrong shape. You should post questions like this in the forum section for best results.
Charlie Stephens