ON THIS WIKI
The Squeegee is a tool added by the OpenBlocks mod. When right-clicking with it on a Canvas, Glass Canvas, or any other blocks a Paint Brush can be used on, it will erase all of the paint from that side of the block. Clicking whilst crouching will remove paint from all sides of the block. Any Stencil that's applied to a canvas will also be popped off by the Squeegee.