Print as many trays as you want. They stack on top of each other to keep the paint good between paintings! Use the off-the-shelf paint palette as an insert or put down some wax paper for oil paints.
https://www.amazon.com/gp/product/B074W56CQ4/ref=ppx_yo_dt_b_search_asin_image?ie=UTF8&psc=1
PaintPaletteLid2.0_BLANK.stl | 133.5KB | |
PaintPalletteTray2.0.stl | 376.0KB |