Rubber pencil erasers have several useful applications for owners of luxury watches. They can help clean up acrylic and ceramic blemishes.
Eraser on Acrylic
Vintage watches and watches with deliberate vintage overtones (e.g., Panerai PAM 249, Jaeger-LeCoultre Tribute to Deep Sea, and Omega Speedmaster Professional Moonwatch) often feature acrylic (Plexiglas/Thermoplastic) crystals that are susceptible to scratches and swirls. With the exception of deep gouges, these scratches often can be removed with a rubber pencil eraser, a clean cotton cloth, and a clean microfiber cloth to finish the job.
Owners of contemporary watches that feature ceramic (e.g. many Hublots, IWC Pilot references, and Omega Dark Side Of The Moon) or ceramic-coated “ceramized” (e.g. Panerai PAM 339, Zenith Chronomaster Bullitt) often accumulate case marks that the owner believes to be scratches on the ceramic surface – actual damage.
In many instances, these marks – even when left by contact with metal – are evidence of the offending surface that have been shorn off by the ceramic itself. The damage isn’t to the case; these marks are material that was deposited on the ceramic by contact. A large rubber pencil eraser can be used to remove many plastic, wood, drywall, and even metal streaks left on a ceramic watch case.
The process for removal? Simply swirl the clean eraser head over the light scratch or smug and then wipe clean with a clean microfiber cloth.