The Art of Changing a Guitar’s Finish Without Damaging It

Modifying the color of a guitar's finish can be a rewarding project for music enthusiasts, but it is crucial to approach this task with the right knowledge and tools to ensure quality and preservation of your instrument. This article provides comprehensive guidance on the best methods and materials to use when changing a guitar's color without incurring damage.

Why Modify a Guitar’s Finish?

Many guitarists find their instruments' original finish appealing, but over time it may fade, chip, or lose vibrancy. Some may want to modernize their guitar’s appearance to match a new style or personal taste. Regardless of the reason, it is important to emphasize that changing the color of a guitar should only be done by someone experienced in the process, especially if the guitar is valuable. (Do’s and Don’ts of Guitar Finishing)

The Process

Changing the color of a painted guitar is a multi-step process that requires meticulous attention to detail and the use of specialized materials. The key steps include:

Preparation and Cleaning Stripping and Masking Applying the New Finish Polishing and Finishing

The following sections will guide you through these steps in detail.

Preparation and Cleaning

The first and perhaps most critical step is preparing the surfaces of your guitar. This involves thoroughly cleaning the instrument to remove any dirt, oil, or other residues that could interfere with the new finish. Propylene glycol (a common substitute for propyl alcohol in some markets) can be used as a cleaning agent. Ensure the instrument is completely dry before moving on to the next step.

Stripping and Masking

Next, you will need to strip the old finish from the guitar. This step is often done using chemical strippers, which should be applied in a well-ventilated area. Once the old finish has been removed, it is essential to mask off areas of the guitar that you do not want to be painted. This includes the neck, bridge, and any other non-painted parts. Clear masking tape is ideal for this purpose.

Applying the New Finish

Once the surface is clean and masked, you can begin the process of applying the new finish. There are two primary methods: brushing and spraying.

Brushing: For thorough coverage, you may opt to brush on the new finish. Specific cellulose varnishes designed for guitars are the preferred choice, as they provide a smooth, even finish. Cellulose varnishes require thinning with cellulose thinners to ensure proper application. This method is more labor-intensive but allows for better control over the thickness of the finish. Spraying: The preferred method for achieving a professional-looking finish is spraying. Aerosol propellant guns are widely available and can provide a consistent, smooth finish when used properly. Thinning and practicing the spraying technique is essential to avoid applying too thick a coat, which can make the instrument look cheap and poorly finished.

Polishing and Finishing

Once the new finish has been applied, it is necessary to allow the instrument to dry completely. Then, use a high-quality polish to bring out the color and protect the finish. Polishing can also help to smooth out any imperfections in the new finish.

Considerations and Recommendations

Remember that changing a guitar's color is a demanding task that requires patience and skill. It is strongly recommended to defer this project to a professional if you are not confident in your ability to execute the task properly (Why DIY Guitar Refinishing Can Backfire). If you decide to tackle it yourself, ensure to follow all recommended safety measures and to have all necessary materials and tools on hand before beginning the process.

Conclusion

The process of changing a guitar’s color can transform your instrument’s appearance and renew its vibrancy. By following the steps and using the appropriate materials, you can achieve a professional-looking result without damaging your guitar. However, it is crucial to approach this project with care and caution to ensure the longevity and beauty of your instrument.