Hi 👋 @p3paula I don’t use a fixer on these the stuff is pretty fixed already color pencils and acrylic are hard to get off. I may do a series with this idea and if I was planning on selling them I may try a fixer, most of the time I am just playing and just give them away. I wrote a blog post on how to have unlimited supplies
https://steemit.com/art/@allowisticartist/unlimited-drawing-materials

This is a painting on the inside of a cornflakes clerical box can’t take it too serious. I like to have fun that serious stuff is for grownups.