Maybe that's something you can do with fabric paint? Get a pair of white leggings, put tape over where the white stripes are supposed to be, and paint on it with some watered-down fabric paint for a more even coat..
That's what I would try, at any rate. I haven't actually done it before.
Alphonse Elric (movie version) Fullmetal Alchemist : Retired
Sciezka (Military) Fullmetal Alchemist : 100% completed
Shizune Naruto : Retired
Sloth (Anime) Fullmetal Alchemist : 100% completed
Hufflepuff Student Harry Potter : 100% completed
Sarah Jane Smith Doctor Who : 100% completed
Leela Doctor Who : 95% completed
Jessie Toy Story : 0% completed