Dirty dolls? Acne medication + sunlight = awesomely removing pen marks from dolls, blogs Baby Toolkit. Acne meds are diluted benzoyl peroxide. This reacts with the UVs in sunlight to release oxidizing agents that dissolve the pen marks, without bleaching the doll or removing paint. Instead of tossing out that dirty doll, you can clean it up.
Clear Unsightly Blemishes: the Case of the Ballpoint Baby Doll [Baby Toolkit via BoingBoing]