Sengoku1986...
Removing the keychain attachment makes it more of a flashlight, and less like a novelty. Nice idea, IMHO.
That's an even better idea to spraypaint the reflector to get rid of the artifacts!
But how did you get the lens off? I managed to get the black plastic LED holder out OK, but there is a metal washer with 1/32" holes in it on the back side of the reflector. Three plastic pins from the back of the reflector protrude through this washer. (The pins go through the holes in the LED holder).
And the metal washer doesn't seem to be removeable because it is a slightly larger diameter than the threads on the neck of the head.
Did you somehow push the lens out from the inside, then reglue it back on after you painted the reflector? My KeyMate is brand new. Maybe yours was an older one and constructed differently?
Thanks for posting the photos!!