If your child is in a group that the world has a negative projection of the physical, by all means build that self worth that they may struggle with later. Especially if they look at you, and you posses what the world calls beautiful and they posses the opposite.
for example , I am Biracial and have (gorgeous :P) Kinky Curly hair. In the African AMERICAN community 20 years ago especially- kink (hard to comb through textured hair) was considered Ugly, all attempts to tame the hair were expected to be made. My Mother had a Long straight shiny Mane. I remember longing for that hair, it was like a barbie doll. I also remember My mother telling me on several occasions casually that she wishes she had curls like mine and that my skin was so pretty. It wasnt a big conversation just simple seeds being planted to love the skin I was in and the hair that God designed for me!
It goes along with telling your daughter she is beautiful. Some would not do that because it emphasizes the external. But what if you never told her and the rest of the world tells her she is unsightly? who and what would she believe?
Actions and images go so much deeper than words. So we fill our kids with the positive images to deflect the negative. Something's working. At 14, my daughter has a good sense of who she is, and is self-confident and strong. She's beginning to recognize the negative, and point it out.