Thanks so much! I'm sorry this is really really late.. I haven't logged into DA for a while because I was working on another big project.
To answer your question, yes, I have used acetone to finish the EAH ones as well. Were you looking at the pictures before or after painting? Because sealant removes the shine. I don't always use acetone on every doll though. It depends on how smooth they end up after the finest grade of sandpaper. Dolls can have a rather random composition from batch to batch that is cast depending on the exact mix at the time they are made.