A security cradle cleaning question (restoring case to its original cream colour)

[aurelio]

Good evening, I would like to remove the ugly yellowing from the woodstocks' security cradle (see attached pic), but I want like to be sure, by using hydrogen peroxide, as recommended in this previous post for the calculators, not to ruin the red panel of the cradle that protects the display. I don't know what effect the bath can have on this material, probably none.
Has anyone had experience with this item before?