Polishing

Polishing is an Invention perk that has a chance to transmute a gathered resource to a higher tier.

When the perk triggers, it prompts the message:

When polishing activates, the experience gained in the gathering skill will be that of the original item, not the transmuted item. For example, if Polishing transmutes a Log into an Oak Log, only 25 Woodcutting experience will be gained, instead of 37.5 experience.

While fishing, perk can trigger along with double catch ability in result of gaining doubled upgraded ressource. Chat message about this action will refear that player catched two upgraded items instead of one actually fishing for.