I played about with the paint pans and made a basic plan. I did some measuring and cut the strip wood up into the right lengths.
With a bit of glue and then pegs made from cocktail sticks I ended up with a box. The small square strip wood made the dividing places to hold all the paint pans in place.
I had to add some extra strips of wood to take up the screws for the hinge and I added a strip of wood so that I could put folded up paper towels inside the box.
The inside had four coats of gesso and one of white emulsion, I thought that would make a good surface for a palette. The rest had a good staining then got waxed with black bison wax, mainly because I like the smell.
After it was all dry I put all the paint pans in with a little silicone glue to hold them in place.
So now it will gather a lovely patina of paint as it is used and I have a lovely new paint box for the next 40 years.