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I've been trying to restore the color on my XL gray baseplates. These were sitting in the sun and hydrogen peroxide for a day before it rained and diluted my 3% hydrogen peroxide. I let them sit in that for another day, but the progress hasn't been noticeable. They are much cleaner than they were when I got them, but what should I do about the color? Another hydrogen peroxide bath? Oxiclean?
The picture has the middle one upside down so you can see the ideal color.
