I saw a fairly long thread about this a while ago on another forum. Results seemed to vary, there was a risk of ruining the finish and some people found the effect was temporary i.e. the yellow came back after some time.
It almost certainly makes the surface porous when it takes off the discoloured surface. Perhaps it would work if it were followed up with some kind of wax polish afterwards. I would not like to try it with optical plastic of any kind without a lot more testing.