Sorry but I dont see the point in trying to paint an actual peice up on a canvas, I dont think it belongs there, All tidy and small and done in your bedroom and shit,. What is the point? it just seems sucky, like your trying to prove yourself as a writer without actually writing.
Re: Re: I was messing around last night...
Use different pens. Stencil, paint, Paint markers, Inks, Biro's, Tip Ex.
Experement its only canvas or board you can always bin it or paint over it. In short find your own styles and techniques.