钢板面或边缘有少许锈斑是允许的。
It is allowed to have a little rust on the brim of steel plate.
本品运用独特的清洁配方，能去除铝制品、铝合金制品上的污垢、油垢、锈斑，同时对铝制品有护理，光亮作用。
Specialized formulation, removes dirty and rust stain on alumium metal ware, in the meantime, it can protect the alumium metal ware keeping it shinny.
戒指内侧有一层厚厚的锈斑。
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