Is is the plastic, or the dye in clothing, or paint? Or all three?
My FS Twilight Sparkle is wearing her tiara, FS Applejack is wearing her hat (painted brown and sealed in matte Mod Podge), FS Rainbow Dash is wearing her sunglasses (painted black and sealed in matte Mod Podge), and FS Luna is wearing her tiara. Should I remove any of these if I want to prevent "saddle sores"?