Skimcoat: Roll on compound to surface. Wipe smooth with the Magic Blade! Bring old walls back to life! Lightly wet the blade for the best result. Knockdown: Lightly touch the trowel to wipe top of the texture off, creating a knockdown effect. Easily create textures with trowel. Repair/Finish: After applying tape to the desired surface, roll on compund and wipe smooth with Magic Blade. The Magic Blade can be used to erase trowel lines, finish drywall, skimcoat walls, and create knockdown textures efficiently! Produces excellent knockdown results and even works on concrete surfaces. Our Magic Blade is available in 12", 18" & 22"!