Do damage bonuses affect a weapons maximum damage?
All-out-attacks and weapon quality do not increase a weapon’s maximum damage. Maximum damage represents the largest wound the weapon can inflict; a sharper blade (read “fine weapon”) or all-out-attack merely allows you to do this using less ST. Apply maximum damage limits after adding up all modifiers except for Weapon Master or Throwing Art. If damage exceeds the maximum, then lower it to the maximum. Once you’ve done that, apply the modifier for Weapon Master or Throwing Art. This will allow a Weapon Master or Throwing Artist to exceed maximum damage. Source: Dr.
All-out-attacks and weapon quality do not increase a weapon’s maximum damage. Maximum damage represents the largest wound the weapon can inflict; multiply the ST of a weapon by 3 to find the maximum ST you can apply for damage purpose. A sharper blade (read “fine”, “very fine” or “super fine” weapon) or all-out-attack merely allows you to do this using less ST. Damage bonuses given by “cinematic” abilities like Weapon Master and Throwing Art are applied after the limit is. For example, say a broadsword is wielded by a ST 40 ogre with broadsword at DX+2 and Weapon Master. The ST listed for Broadsword is 10, so the maximum ST that can be applied is 30. Swing damage for ST 30 is 5d+2, and broadsword damage is sw+1 cut, for a total of 5d+3. Being a Weapon Master, he gets a bonus of +10 damage. Total damage is thus 5d+13 (or 8d+2 if you use the optional Dice+Add rule of p. 269) cutting.