Start with a soft and large round brush with a 50% opacity.

使用柔软的大号圆形橡皮，并将不透明度设置为50%。

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Grab Eraser tool, and with a soft round brush I will delete the top parts of the shapes.

选择橡皮擦工具，用一个较软的原型笔尖，删除形状的头部。

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Use a round wire brush to clean the insides of the fittings.

用光圆钢丝刷清洁配件内侧。

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When his mistake emerged, Bob would have had a metaphorical clip round the ear from the gaffer and would be sent out at first light the next day with brush and paint to correct his mistake.

BBC: Lines painted in early Spring...