To wipe factory faceups on vinyl or resin or anything, use tea tree oil! (You can purchase this in the vitamin aisle of your local pharmacy)
It works like a charm, has been safe for me, used on vinyl, resin and plastic---it won't melt them, and doesn't have foul fumes! (Just sort of medicinal scented)
Get about 3-4 q-tips ready, take one, dip it in the tea tree oil and rub on the eyes/brows/lips---whatever you want to remove.
It will take the highlights off first and then get a clean qtip, dip again in the tea tree oil and rub. After about 3-5 minutes, it will all come entirely off, depending on the doll. Some will come off in 30 seconds, others take a bit more elbow grease.
But guaranteed, the tea tree oil will remove the faceup better/faster than alcohol, is safer to use and smells nicer, too. ^^
I've done this method with literally hundreds of dolls and it never fails. ^^
After you get the faceup off, rinse with water or soap and water, and the head is all set to paint! ^^
Good luck!!!! ^^