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Looks good. You can also paint all the details with some proven paint and wipe the clean. It will leave paint in all the details and add a lot of depth. They look great as is too.

Also, like Sharptonn said, they can be painted.
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These looked much worse than yours when I started.

I clean scales like this with a gun cleaning brush. A toothbrush will also work. Put a little dish soap on the brush and give them a good scrub. You’ll be surprised by how well they clean up. Then...