What technique can ensure even filing of a gaff tip?

The technique of coloring the gaff tip with a black marker is effective in ensuring even filing because it provides a clear visual reference. When the gaff tip is coated with a marker, the user can easily see where the material has been worn away during the filing process. As the marker is removed in areas that have been filed, it indicates that those sections have been sufficiently smoothed or leveled. This method allows for precise and uniform filing by helping to avoid over-filing in some areas while neglecting others, thus promoting a more consistent and even shape overall.

Other methods, such as using power tools, may fast-track the process but can lead to uneven surfaces if not handled with care. Filing from one direction only could also result in inconsistent shaping since it restricts the natural motion of filing, which can lead to unevenness. Adjusting the filing angle is important for technique, but without the visual guidance of the marker, it's easy to lose track of the evenness of the filing job. Therefore, using the black marker not only enhances filing accuracy but also serves as an effective quality control tool during the filing process.