can artist grade acrylics be used in fountain pens? I've found, in my light studies, that many metallic inks are already diluted versions of acrylics, so this does not seem to be a complex process, I have more fear of adverse effects to the pen. I am asking because I am doing a painted peice and have been unable to get the contrast on white paper with traditional inks in the inked outline. my plan is to use a diluted version of Stuart Temple's black 2.0 paint. the pen I am working with is a lamy safari ef for prototyping and, should this prove successful, a lamy 2000 ef. In my preliminary explorations, it seems theoretically doable, but I wanted to see if anyone has experience in the matter before I went off and did it myself.