That looks fantastic. Thank you for sharing! Definitely worth a stream or a similar blog post about it.
Paint does sound quite tricky, all kinds of issues with it, dripping, how long to write before needing to dip the brush, the direction of travel, many other things? But it can be quite neat, a thicker paint could create layers and textures.
Currently in progress on scaling it up, I want to get to a 40"x40" scale to have room for a acrylic paint holder or watercolor.
The hardest part of image -> painting is converting svg to gcode, which is full of interesting.. problems.
I might do a build in public stream for it, although its pretty hard to film.
Heres a couple photos: https://imgur.com/a/0QyKQ6z