Most jobs call for a Fire Proof paint
I've only had one idiot architect that I can remember spec that for the telephone back board. It isn't an NEC requirement and I know of no local code here that requires it either. I just painted it with our standard silver gray and nobody knew the difference.
I do remember fire resistant paint being common many, many years ago on electrical backboards. I wouldn't even know where to get it today.
-Hal
