See what material it is. Some wood can't shine when it is used up, so it can only be waxed or painted. High density and high oil can be polished brighter, but it is not easy to achieve mirror effect. Roughly polish about 600 in the early stage, then 1000- 1500-2000, and then put the electric tool on the cloth wheel for repeated polishing. Polishing is a long process, I hope everyone has patience!