rust spot造句

Please scour rust spots from the knife .
请擦去刀上的锈斑。
This dao is estimated to be around 60cm long ( very short , it can ' t be measured accurately without ruler at home ) and two fingers wide ; intact scabbard and fittings with perfect appearance ; no collapse on blade , little rust ; stretchy ; there ' s buff pattern - shape rust spots appeared after polishing several minutes which should be so - called pattern steel ; regular and symmetrical blood groove
该刀刀长估计只有60公分左右（很短小，家里没尺不能准确的量）、宽两指；刀鞘和装具完整且品相极佳；刀刃无崩口、卷刃、锈很少（任何地方都可以削铅笔）；弹性十足；磨了以后几分钟即出现浅黄色锈斑，呈花纹状，应是所谓花纹钢；血槽非常工整、对称。
It's difficult to find rust spot in a sentence. 用rust spot造句挺难的