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If your GraviTrax tiles have turned yellow from the sun, try this! This video recommends the use of 3% hydrogen peroxide in …
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You're the Walter White of GraviTrax 🙂
But it's not just direct sunlight. I store the parts in transparent boxes that are on the shelf and so are not actually exposed to sunlight. But daylight still gets to the parts, of course, which then discolor more slowly.
How do you color the tiles different colors?