Finish the following sentence with the best choice: How to cure and seal concrete?

Choices:
- Let the concrete set for 48 hours. Remove the concrete from the wooden form and sand down the corners. Put on a concrete sealer.
- Let the concrete set for 48 hours. Remove the concrete from the metal form and sand down the corners. Put on a concrete sealer.

Answer:
Let the concrete set for 48 hours. Remove the concrete from the wooden form and sand down the corners. Put on a concrete sealer.