Marks from putting on the cap are unfortunately regarded as use-related and are hardly subject to complaint, even with higher-priced writing instruments. Anyone wanting to avoid this should choose models with screw-on instead of plug-on caps like the StarWalker. Polishing is possible oneself with Wenol; however, material is removed in the process, and coated metal parts are particularly sensitive. Boutique staff are not everywhere expertly trained; specialised retailers are often more competent and accommodating. Detailed instructions for polishing can be found in the newsletter on fountainpen.de.