Mahogany curls did it on her natural hair and it was beautiful. Check her video. I find for my hair it helps to go through with a rattail after major detangling because my curls are tight and I have a strong pattern. This makes my hair conform better to the shape of the rollerset.
Low porosity, high density, and fine
4a/3c, mod-CG, itchy prone scalp
Natural 4 Life