Match Them.

a. Use "Bar Keep's Friend" (or something similar)and make a paste with it. Then scrub thoroughly. Then wash with soap and water.
b. Use a wet stone (make sure to get it wet first!)
Use a honing rod
c. Soap and Hot Water Coat with vegetable oil
Place in the oven for 1 hour
d. Spray with water and vinegar mix. If needed, apply mineral oil and dry overnight.

1. Cast Iron
2. Knife
3. Stainless steel
4. Wood Cutting Boards

1 answer

a. 1. Cast Iron
b. 2. Knife
c. 4. Wood Cutting Boards
d. 3. Stainless steel