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Several people have asked me to do a materials rundown. Here are some brush pens I like to use. They are good for when I am on the go.  left: Pentel Pocket Brush Pen, ~$16.99, comes in a stupid packaging but has refill cartridges. Recommended by Jesse Balmer and Alison Dubois. right: Kuretake Zig Letter Pen, ~$8 total, you can choose the body and pen of this one. I got the ~*~Starry Nights Gray with Glitter~*~ bod with a Brush Type pen refill. I also got the super fine pen refill, but it was kinda weak. Also recommended by Tim Beckhardt.  More to come.