Adamantine Paint

This item will permit the owner to coat a suit of armor, two weapons, or 4 of a different type of item in adamantine. In the case of armor it will make it so the armor is then immune to critical hits and grant a +1 bonus to AC. In the case of a weapon it will add a +1 to the weapon's attack and hit rolls and cause every attack made with the weapon to be a critical hit when striking structures otherwise will let the user roll with advantage when confirming critical hits additionally it will allow every hit you make to roll an extra d20 to see if it is a critical hit. If a different type of item is coated the DM will decide the properties of the new crafted item.