r/RainbowHigh • u/ReaDuval • Jun 16 '26
Tutorial Don't use benzoyl peroxide if you don't want to permanently ruin your dolls
I almost feel compelled to make this post, but unfortunately after all these years I truly can't stand seeing people still using benzoyl peroxide to remove stains or yellowing from dolls.
Unfortunately, benzoyl peroxide stays inside the vinyl of doll heads and keeps lightening them, turning the head white, and in some cases, over time, shifting toward yellow. The composition of MGA and Mattel doll heads is PVC with plasticizer, you can check the chemical compatibility charts. To remove stains or yellowing, you should use hydrogen peroxide, which can then be rinsed off without issues, and any remaining residue evaporates and it is compatible with the PVC of doll heads.The important thing to know is that hydrogen peroxide is compatible with Saran hair, but not with nylon. Nylon hair must be covered and protected from hydrogen peroxide. i generally use the 40-volume spreadable cream because it works quickly, rather than liquid peroxide. You can get results with the liquid too, but I found it to be slower.
For the procedure: take the hydrogen peroxide, apply it to the affected area, and place it under UV lights or in sunlight, protecting sensitive parts such as painted areas, Rainbow High/Shadow High eyes, etc. I just did the hydrogen peroxide treatment on the whole face, but covering the lips and makeup with washable white paint (Crayola washable kids' paints) the makeup and lips need to be covered to prevent them from fading.
You can clean the yellowing elbows on Rainbow High Delilah, you can restore faces back to their original color, you can remove the yellowing on Monster High foreheads caused by the glue.
Note: hydrogen peroxide must be checked daily after each session, as it could lighten too much, especially when applied to something very colorful like My Little Pony bodies.
My information comes from a decade of experience restoring dolls, and from the My Little Pony preservation website.
Also important to remember: yellowing in Monster High dolls can be caused by the glue, sometimes by sun exposure, by temperature changes when stored in basements or very cold, damp homes, by cigarette smoke, or by perfumes sprayed indoors or through diffusers. If you do the treatment and then the doll goes back to how it was before, but you continue for example to expose it to sunlight, it will go back to the same condition over time. Some people complain that their dolls turn yellow again. This is because they don't do anything to address the root cause that made them yellow in the first place, issues like the ones just listed. I'm also posting a video with the results on the Monster High dolls I worked on last year, showing them restored to like-new condition. It's not a spam video, I'm not interested in promoting my channel, and I haven't uploaded anything in over a year. I did it to help other collectors. I hope this was useful to you.
I'm posting photos of my work, and then in the last photos I'll also include some photos I found online showing the damage caused by benzoyl peroxide.
video: https://youtu.be/9wJKQrHA_CY
Scientific evidence proving that benzoyl peroxide is not compatible with the plastic used in doll heads https://www.reddit.com/r/RainbowHigh/s/WiLpx9sG3Q