Hull Scrubbing is part of a Ship Repair mini-game that pirates can play to earn some pocket money repairing vessels. Stationed around each Shipwright stand are three repair tables, marked with signs. These signs indicate the difficulty of the repairs needed. This challenge is not part of the mini-games you have to complete to repair your ship at sea. Note that hull scrubbing is only available for players at ship repair at the shipwright stands, not onboard a vessel (on vessels, Hull Scrubbing is replaced by Bilge Pumping).