out of curiosity, is this possible?
if not, what dyes do you recommend for this method?
i'd love to try some handpainting with roving, but i'm not sure what dyes to use, or if it's different in any way from regular dyeing.
Sure, you can use Koolaid! Just do a search on how to do it through Google...a tutorial should pop up for you.
As for other dyes, there's a lot - Jacquard/Gaywool/Washfast - just to name a few.