This was printed with a 0.25mm nozzle. I haven't tried it on a 0.4mm yet, but looking at sliced files it should print fine with a little loss of detail.
I had good luck using standard washes when painting this model. With other FDM prints I have had issues with washes getting absorbed into the print. I think what helped with this one was the use of filler primer and 0.05mm layer height.
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