Be they fabric or oil based, it's official, I'm obsessed with paint pens. The possible applications for these snazzy little markers are truly endless (and SO not messy...big plus).
I first experimented with the oil based pens on wood, creating freestyle geometric patterns (yes I'm also obsessed with this pattern, I can't help it. It's so fun and nearly impossible to mess up). After playing around a bit I got the hang of these. I found that you have to shake and push down hard for a bit on an alternative surface to get the paint flowing in a consistent manner. Then when you notice it start to fade you'll have to do this again. I was pretty happy with how my little experiment turned out and I'm thinking of making a few more as a set of coasters (which I will then seal and add little padded feet).
Once I got going with this little pen I couldn't put it down. For my next project I covered a 12x12 boxed canvas in black acrylic paint. After letting it dry I jumped right in with the paint pen (making sure to prime the tip first). I was pretty happy with the ease of use. I missed the interesting line quality that an actual paint brush would give but with how fast it all came together I really can't complain (I'm sure with practice one could become quite skilled with this medium). I like how it took on a chalk-on-chalkboard sort of look.