Retrobrighting/Deyellowing - A New Way? Is it True? Part 4

Is there a much simpler way to deyellow old plastics? I'm gonna find out. Here's a friend who Is trying it out on a Dreamcast and a SNES: https://www.youtube.com/watch?v=4eBynrpdLdk

Part 1 can be found here: https://youtu.be/VDebjIepV6o
Part 2 can be found here: https://youtu.be/yN1qXtUC_r4
Part 3 can be found here: https://youtu.be/oc8e_q-xcuw
Here's the inspiration video: https://youtu.be/8P1OVj0IcqY

Видео Retrobrighting/Deyellowing - A New Way? Is it True? Part 4 канала Rebel Scum