Instructions
Battle the first boss, the Mad Clock Tower, in the Gremlin Village. To earn the paint upgrade, spray paint at both of the robot's arms. When you paint each arm, they drop down, allowing you to climb them and reach the robot's face. Spray paint in the Mad Clock Tower's face to defeat it and get the paint upgrade.
Fight the second boss, the robotic Petetronic, in Tomorrow City. Stun Petetronic by spin-attacking the disc he throws at you. Spray paint at the exposed tank on Petetronic's back. When you defeat him this way, you get a paint upgrade.
Battle Captain Hook, the third boss, in the Pirates of the Wasteland area. When the battle starts, use paint to fill in the missing pieces of Hook's ship. Climb to the top of the ship and free the caged Sprite to get the paint upgrade.
Face the fourth boss, the Mad Doctor, in the Lonesome Manor. To get the paint upgrade, disable the generators in the room with your Sketches. Find each of the three pressure plates on the floor. Each plate features a different picture. Use an Anvil, TV and Watch Sketch on the correct panel to disable the generators and earn the paint upgrade.