I assume Surefire (still) chemkotes all their lights, inside the flashlight body and the threaded areas) . Is the treated area always a brassy yellow color, or is it sometimes 'white' (as in shiny aluminum) in color?
This has come up in a few other threads in the past year. Apparently they have changed their chemcoating process to a similar but more environmentally benign process, which appears 'clear' instead of 'brassy'.