Not clear coat, just a method to compress and dense leather fibre, so they will have a smooth surface, and looks more finished.
Apply a thin coat of Tokonole on the edge, then use wood slicker lightly rub the edge back and forth, slow at first, till the fibre start to lay down, then you can increase the speed of movement. Do not put too much pressure, otherwise may misshapen the edge. It is the heat of friction together with Tokonole to achieve the burnished effect. Lots of vedios on YouTube.
ETA: only use ToKonole, you may see other material used on YouTube vedios, but those only work on veg tanned leather. My court bag looks really polished with it’s burnished handle. I don’t even recognize her myself compare with the before photo. It was a bad buy from Etsy that I tried to return but unsuccessful. She came to me painted with lots colour loss in the pipping. I stripped the paint, dyed it with Navy pro dye.
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