I think the lots of tape markings would work the best, that way I can just yell out to someone the black on black or something. Would Electrical or Painters tape hold up best to being soaked in acid or oxygen cleaners?
In Primary: Belgium Chimay clones.
In Secondary: Braggot, pale ale, end of the world white.
Conditioning: Mead, Cider, braggot, Belgium Wheat.
On Tap: Clones, Chimay Blue, Red, Porter, malted cider.
Bottles: Far, far, too many to list.