Dear All, New here. I am an artist and am researching to make my own DIY Permanent marker ink that I can make to fill on an empty marker pen. That way I am free to create the color that I can conjure myself. I've researched on the internet (eHow.com) that using household paint with gradual mixing in of thinner till I find the correct consistency is the way to go. Any tips or directions would be greatly appreciated KimK.