Now, there are three shoeshiners who do 40 or 50 shines a day at most.

现在有三个鞋匠，一天最多擦四五十次。

The shoeshiners cleaned the footwear and added an oily substance to protect the shoes' leather material.

鞋匠们将鞋子清洗干净，并添加了一种油性物质来保护鞋子的皮革材料。