
Hmm… to be honest since you’re doing your first you might do better with some creative blushing. xD; It might look a little funky since Barbies are perpetually in a grin, however I think it might work. I say so because Monster Highs actually have a smal gap in their lips, which I didn’t know they had until I removed their factory paint.
By “creative blushing” I mean just using darker colors on the inner lips/around the gap and then work your way out.
However, honestly, I’m not certain how well it’ll work since Barbies have such exposed teeth… I don’t/didn’t want to recommend epoxies or clays since it’s your first time. xD;