The tops are acrylic paint over HDF (wood). The process to get them looking that nice is extraordinary. They are painted, then polished on large buffing wheels in a series of finer and finer grits until the final polish which is done by hand. It’s about a twelve step process if I remember. In any case, as Frank suggests, you can treat it like any painted surface. Mostly, think of it as a car finish. It can be polished, waxed, even rubbing compound if it’s in bad shape.