What Should Be Done with the Leftover Polishing Agents, Such

What should be done with the leftover polishing agents, such as rouge, after an appliance is polished?

A) Place it in a cup and run a slow stream of water into the cup to rinse the material.
B) Spread the material out in a pan and steam sterilize it.
C) Let it air-dry overnight and return it the central bulk stock.
D) Throw it away.