So I thought I'd post this here because it's a subject that's been discussed to death, but people who always ask questions deserve clear answers.
So here we go this is the truth about reicing your soles. Their are many products on the market. 40 volume, Sole Bright, SeaGlow the list goes on. So let's finally have some truth on the subject.
1. If you don't have patience don't bother even attempting to reice yellow soles. It takes time, patience, and a considerable amount of dedication. The process can take weeks sometimes hour long sessions every other day. Here's a detailed video showing the almost month long process.
2. Protect yourself!! Many you tubers use corrosive toxic materials such as peroxide (40 volume) or boat cleaner (SeaGlow) without proper rubber gloves or eye protection. I cannot stress how important it is to have respect for these sometime volatile chemicals. Heres a video showing some severe skin reactions.
3. The key component is UV light the sun is the preferred method. Here's an article on how UV light works with rubber.
http://www.sciencedirect.com/science/article/pii/S135047890970529X
4. These materials can ruin midsoles and eat away at paint. Be careful and pay attention!. Refer back to point 1.
5. The great debate as to what material works best, they all work if you refer back to point 1. Your trying to reverse years of oxidation (yellowing) so respect the time it takes. Each person has different results but what we all can agree on is this is a marathon not a sprint. Here's a video to make your own sauce.
6. Do not buy into before and after pictures as results can vary. Again refer to point 1.
7. Avoid contact with uppers as many of these chemicals mainly contain high levels of peroxide. Many YouTubers splash it around with disregard. Be extremely careful.
8. Their is no one all cure for yellowing I suggest testing different products until you find the one that works best for you.
9. Preparation is half the battle. Learn what your working with. Do not use hair dryers to speed up the process. Again, step 1. Follow YouTube videos only as a basic guide.
This has been beat to death but for anyone new reading this. This is the truth. It won't happen overnight, if you want a quick fix then considering dyeing your soles instead. Here's a basic how to video on dying soles.
If any mods see this please considering giving it a sticky. Hope this helped.