Preparation materials: shoe brush, disposable gloves, small brush, yellowing agent, yellowing sneakers,

1. First clean the soles and then dry them.

2. Apply paper glue to the edge of the yellowed area to prevent the yellowing agent from entering the outside of the sole to avoid damaging the shoes.

3. Now prepare the yellowing agent.

4. Apply an appropriate amount of yellowing agent to the area where the sole needs to be yellowed, and then apply it evenly with a brush. It is best to wear gloves when handling to prevent the yellowing agent from sticking to your fingers and making it difficult to remove.

5. Leave the yellowing agent in place for eight hours.

6. Finally, wait eight hours, then brush off the stain and dry it.