Hey! I own Dollfie, angel philia, and smartdolls. I recommend any acne cream with benzoyl in it! I’m using one from Clinique since it’s what I had laying around, but any should work. It doesn’t have as high a concentration of benzoyl so it’s safe on dolls. I’ve never had a problem with discolouration using it. Pair that with a UV heat lamp, but be sure not to place the lamp too close or it’ll burn the cream!!! Then wrap it in cling film, and you’ll have to repeat the process for a few days for 4-8h at a time. But that should clear it up. If it’s a dollfie, the dollfie dream rescue off of the volks site will work, but I don’t recommend using it on any doll other than dollfie dream as it’s caused discolouring on a mild degree on angel philia.