Goat leather, in Europe, is very soft and pliable and it's used almost for shoe linings. It can be found between 0,4mm to 1,2mm (1,6oz to 3oz) and majority of shoes manufactures use 0,7mm. They don't skive it. It's so soft that a little pressure reduce in half it's thickness. I think a belt sander can help you. I'm not a leather professional.