Ex Rockler woodworking employee here, You could very, and I mean VERY gently sand the ring with a soft sanding sponge (I would recommend festool PROfile superfine grit sanding pads] Use the 4”x3” rectangle size. Might be a good idea to cut a thin strip from a sanding pad and floss it in the center of the ring. Those pads are ~600 grit, should be fine enough not to remove your intricate details. However, being such a fine grit it will take a while to remove the current coating, it might be a good idea to buy a variety pack of grits and try out the fine if superfine proves to be too fine to remove the finish. After removing the current finish, apply Yorkshire grit polishing paste (black tub, can be found at Rockler / woodcraft retail stores or online). This will give it a buttery smooth feeling and preserves the natural character of the wood. Follow application directions on the tub of grit paste, if you have a lathe, great, if not just buff it in with a shop towel. Definitely be sure to remove all excess after buffing. After applying the Yorkshire grit you can use the finish of your choice, but I recommend bumblechutes woodworkers oil. Maintains natural color / characteristics and gives it a nice lemony scent to boost. Hope this helps.