Quick answer: There is no single best pen finish: balance appearance, durability, repairability, handling and shop safety.
Why finish changes the character
A pen is handled, carried, warmed in a pocket and exposed to skin oils. The finish becomes part of the user experience, not just a glossy photograph. A thick film may emphasize depth in figured wood and offer resistance to daily handling, while an oil or wax may feel closer to bare wood and be easier to refresh. No finish removes the need to prepare a clean, scratch-free blank.
CA film finishes
Scratches in the underlying wood can show clearly beneath a transparent CA film. An uneven film near the ends can chip during pressing or leave a step against the metal parts.
Oil and wax systems
If a maker promises a permanent glossy layer from a simple wax, ask how it will survive years of handling. Choose realistic durability rather than exaggerated marketing language.
Friction polishes and combinations
Do not improvise high-speed application procedures that put cloth around your fingers. The AAW recommends removing tool rests before sanding or polishing and avoiding entanglement hazards.
Match the finish to the pen
Choose one finish, keep a test record, and learn how it wears. This is a better editorial foundation than publishing fake “durability scores” for products the site has not physically tested.
A choice for three pen owners
Do not evaluate durability solely by photographs taken immediately after turning. A handsome surface can still chip at an edge or become dull after use.
A repeatable finishing log
Write down wood species, sanding sequence, finishing product, number of passes only when specified by the product instructions, ventilation, cure time and observed surface. After several controlled experiments, you will have relevant local evidence that generic internet claims cannot provide.
Sources and further verification
Source links are included to help you confirm equipment specifications, accessories and recommended safety practices. Specifications may change with product revisions.