As a result of the investigations concerning the elaboration of efficient technologies for local protection of metallic pieces with isolated coats against plasma nitriding. two variants of special paints were elaborated. Those are based on lamella copper powder with a lime magnesia binding system. in which polystyrene was added in an organic solvent. https://www.unitedssports.shop/product-category/bike-parts-miscellaneous-drivetrain-parts/