What are some good ways to sharpen knives?
user
You can use a whetstone, a metal rod that can be rubbed against a knife blade.
assistant
Is there anything else I can use?
user
I think a plastic sharpening stone might also work, but I’m not really familiar with them.
assistant
Okay, what other materials are they made of?
user
It sounds like you could be referring to a rod or stone made from glass, or maybe even plastic.
assistant
What are some good ways to sharpen knives?
user
You can use a whetstone, a metal rod that can be rubbed against a knife blade.
assistant
Is there anything else I can use?
user
I think a plastic sharpening stone might also work, but I’m not really familiar with them.
assistant
Okay, what other materials are they made of?
user
Plastic is made from organic compounds of carbon, hydrogen and oxygen, and some other types of matter.
assistant
What are some good ways to sharpen knives?