Some tips, Hm? xD Well- number one thing is: Do not use Acrylic paint. At least in my eyes. I used model paints for her eyes. Acrylic paint peals off easily. Another thing is: Do not use spray-paint. It makes the rubber on their face sticky. I made that mistake. xD I haven't found a way yet to change the colour of their skin... OTL
But her hair is actually a Liv Doll wig, straightened with boiling water and cold water. That's really All I did... I sanded off the little heart on her face...
You may also want to put some sort of enamel on her eyes- just in case the model paint used becomes tacky... I used clear-fingernail polish.
I hope that helps-- If you want anymore information- just lemme know. xD