Mild yellow brown tetracycline staining - Child has Tetracycline discolored in permanent tooth what is the proper treatment

Mild yellow brown tetracycline staining:

OR

Child has Tetracycline discolored in permanent tooth what is the proper treatment:

1. Composite veneer ***

2. Home bleaching

3. Pumice micro abrasion

4. Porcelain veneer

I think Pumice microabrasion