A little more information would be good. Do you have spray ability? What kind of paint? Does it matter if some sides get multiple coats and other sides less.
Are you willing to individually turn each piece of wood. Information always helps.
I do not have a spray gun, although maybe it would be worth getting one? Ok to get a cheap one at Harbor Freight?
I am not sure what kind of paint to use. I have thought of cans of spray paint Ö. but I will be using 9 different colors. My last project I used 9 or so different colors and found the different colors meant different finishes. Two of the colors gave me such a hard time re drying, cracking etc. (my husband who is a painter thought it was a moisture issue Ö but every time I used those two specific colors they gave me a hard time).
I am not thrilled with the idea of using canned spray paint, but if a gun would be better might consider that.
I have thought of simply using a brush or sponge and doing each by hand.
I considered sticking the pieces on adhesive then painting.
Last time I used a piece of contact paper but it moved around, bubbled up etc.
I like the idea of spraying cardboard or masonite. Thanks for that tip.
The pieces will be cubes, squares and prisms. I would like for all sides to be as uniform as possible.