This video shows a crude demonstration on how one could optain a liquid photoresist from easily available materials. Although liquid PCB resists like "Positive 20" exist. They are not easy to get in certain regions.
I would be very interested in making this process work, so if any viewers have ideas on how to improve upon this, please leave a comment.
Also check out the great videos of 'ProjectsInFlight' on DIY chip making and photolithography processes:
https://www.youtube.com/@projectsinflight