All day, I tested paints on my garage walls.
First I tried the heavy body acrylics that is used for fine art. Too thick. Can’t create that nice thick and crisped lines. I often had to dipped back into brush to finish off the letters. I tried mixing in with an acrylic medium. Still no go.
Then, I tried house paint. Same problem. When I backtracked there’s streaking. And again frequent dipping.
Based on a suggestion by Carol Bosch, I tried fluid acrylic. Not bad. Transparent. Maybe that’s a possibility.
Another suggestion from another calligrapher by Dena Kuhn, use gouache. Clean, crisped lines. Can backtracked with no streaking. Except the calligrapher suggested spraying afterwards. But a possibility.