细砂布或金刚砂布也可以使用，但同样要小心。
Fine sand cloth or emery cloth may also be used with the same precautions.
但绝不能用砂布，因为金刚砂会嵌入，使触点迅速烧蚀。
Emery cloth must never be used, since particles of emery may become embedded and cause rapid Burning away of the points.
以180号金刚砂布轻轻打磨飞轮表面。然后以除去蜡与黄油的去污剂清洗表面。
Lightly scuff sand flywheel face with 180 grit emery clothed clean surface with a wax and grease remover.
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