@Monomo @freecad To write it simple: Better don't do anything with food and #3dprint. "No print is food-safe without surface coating"https://blog.prusa3d.com/how-to-make-food-grade-3d-printed-models_40666/https://formlabs.com/blog/guide-to-food-safe-3d-printing/https://jlc3dp.com/blog/food-safe