Oh no, its fine with your questions, since I'm technically not working on any Vocaloid cosplays, at the moment, it gives me a reason to stay XD
Cheap method that works 8D
Theres also a method my friend reccomended to me, to use Hair Hi-lighters. She said you could get them at Sally's. I plan on getting them for a cosplay with wtf light hair because I have really dark eyebrows XD Other then that, I don't really see a problem with natural eyebrows though.