回复：班长， 梁兄， Sanding problem: how to fix dark spots

来源: 于 2012-07-23 10:25:00 [旧帖] [给我悄悄话] 本文已被阅读：次

dark spot may not be sanded, it depends on how it form, if it comes from dirty liquid like cat urine, it will not be sanded out, it will stay there forever