




Keeping a fretboard fresh is a constant battle against oxidation, so I put the Guitar String Derusting and Anti-Rust Care Pen to the test. This compact tool aims to simplify string maintenance by combining physical scrubbing with a protective oil treatment in one portable package.
The pen-style design is surprisingly robust and fits comfortably in a standard gig bag. The integrated brush is firm enough to clear away light surface oxidation, while the applicator dispenses just enough oil to provide a smooth, non-greasy finish that prevents future buildup.
Using the pen is intuitive and takes only seconds during a standard string wipe-down. It effectively reaches around the individual windings, making it much cleaner and more precise than using bulky cloths or messy oil sprays.
This is perfect for guitarists who live in humid climates or those who struggle with acidic sweat that prematurely kills their strings.
The Guitar String Derusting and Anti-Rust Care Pen is a practical addition to any maintenance kit, earning a solid 4/5 rating. While it won't fix heavily corroded strings, its $23.90 price point is well worth the investment for the preventative care it provides.