Glossy finish is one genre, and it is not always achieved the same way -- wax and varnish are but two. But many other natural, matte, non-glossy blast, rustications of various types finished various ways ... and much much more. Have there always been glossy pipes? Maybe not always, but going back a century or two. But only some pipes, not all, not by a long shot. The question makes it sound like you haven't been around pipes much, but the answer is no.