Part of a cosmetic article decorated with a resin, and method for covering this part with the resin

A push button for a cosmetic item comprising a surface area delineated by a bend, the surface area and bend being suitable for containing a flowable decorative polyurethane resin,

• said surface area being coated with a decorative polyurethane resin comprising:
• a polyol;
• and
• an isocyanate;
• wherein the isocyanate-to-polyol weight ratio is between 100:57 and 100:67
• wherein the viscosity of the decorative polyurethane resin is between 400 and 600 mPa's at an ambient temperature of around 25° C., when the resin is applied to a part to be decorated,
• wherein the resulting hardness of the decorative polyurethane resin is at least 80 Shore D,
• wherein the decorative polyurethane resin when hardened comprises an outer surface with a rounded, dome-shaped appearance having an apex, and
• wherein the decorative polyurethane resin has a smooth, glossy domed surface with an aesthetic appearance akin to that of enamel when hardened.