What you need to Whiten Your Yellowed shoes
1. Some sort of product with bleach in it
2. Plastic Wrap
3. 2-3 days of Sunshine :)
https://www.walmart.com/ip/Soft-Scrub-With-Bleach-Antibacterial-Cleanser-36-fl-oz/15028898
https://www.walmart.com/ip/Bar-Keepers-Friend-Cleanser-Powder-21oz/15026756