Retrobrighting Nendoroids MyFigureCollection.net

Snagged item/287814 on Amiami for item C but the Pegasus has fairly yellowed on the wings and legs but the body is mostly fine. the armor is unremovable at least to my knowledge.
I am just afraid of the marble effect happening with the paste/saran wrap and how it would effect the plastic. I have seen the wet method too for older computers cases, but I don't know what strength or measurements should be used for these.
Any experiences with retrobrighting figures and how did it turn out?

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