“上、卸扣3次，应无粘扣现象，但不允许有划痕，划痕能用细锉刀修复”英文如何翻译

load and unload for 3 times, there should be no adhesion between buttoms. but scratches are forbidden and should be able to remove by smooth file.

“上、卸扣3次，应无粘扣现象，但不允许有划痕，划痕能用细锉刀修复”英文如何翻译
You should button and unbutton for three times without any adhesion. But scractches are forbidden and can be removed by some fine file.