Could someone please provide a step-by-step instruction for how to do this? It would be much appreciated 
I would like to see step-by-step instructions as well.
Does anyone know the long term effects on the plastics when you use peroxide or retrobrite.
According to this article, it makes the plastic better.
https://www.heypoorplayer.com/2016/03/30/how-to-whiten-your-old-consoles-with-retrobrite-gel/That would be really cool if it does. It sounds kinda iffy to me.
If someone that knows chemistry would like to comment on this subject, that would be great.
Jim