How to fix yellowed plastics on old computers [video]

Although this looks like it works if / when completed correctly, many retro computer collectors have found that after a couple of years or so, the yellowing returns.

The retrobright solution only removes yellowing from the surface. Over time, the bromine resurfaces and the case gets yellowed again. The difference though is that now your plastic is slightly more brittle thanks to the retrobright process, so in fact you're worse off now than before.