It is no secret that Dwarves a damn proud of their beards. As they should be! They have the finest facial hair of any of the races in existance. What shouldn't they be proud about?
HOWEVER. Being the owner of a beard myself, I realise the challenges associated with maintaining a fine crop of chin hair. It seems to me that Dwarves would probably pay more attention to a well groomed beard than any of the other races would. I can see them shelling out good money to have someone with expertise in caring for them was behind the scizzors.
In a fortress with an economy, one way a person could make money would be to provide a hair care service. I am not just talking fine trims (and lovely braids for those who picture females with the beards), I'm talking a full care profession. After all, not every dwarf is blessed with a perfect mane. Remedies for patchy beards must have been experimented with at some point!
Obviously fashion comes into play here a lot, but Dwarves are social creatures. Can you picture many women overlooking an unkempt beard after a fortress has pulled itself out of the status of being a boony-fort?
Obviously it would be a skill-type. Legendary barbers could work feats of pure awesomeness on our beloved retards' cheek warmers, while dabbling barbers would take forever to get basic results. And of course, nobles could demand only the finest for themselves. A happy King is a King with a triple-folded dreadlocked beard menacing with spikes of platinum and gold! Can anyone say artifact beard decorations?