Presto Rust Removal Pen is an excellent tool for removing rust from small rusty surfaces. Thanks to the fine wire-free glass fibers, the pen does not damage adjacent paint surfaces - it does not cause scratches or scuff marks. The extremely hard glass fibers thoroughly remove all rust, including from electrical contacts. There is no risk of a short circuit, as it is metal-free.
Pull off the rust with the tip of the pen, applying light pressure to the pen. Do not twist the pen more than 2 mm out of the body. The fiberglass pencil sharpener sharpens itself automatically and enables precise work.
If the protruding part of the core is worn out, turn the core a few turns counterclockwise. If the core is completely worn out, replace it with the included spare core.
To do this, push the gray cap forward and open the housing. There are 2 spare cores in the housing.