Color changing wood
Slow and reverse color changes
Most film-building finishes slow -- but don't halt -- the oxidation process. Some expensive, marine-grade finishes contain UV inhibitors that will protect a project from the sun's harmful rays for a short time. Your best bet, though: Keep your projects out of direct sunlight.
Or to maintain your project's original color, design it for repeated resurfacing. Color changes tend to be shallow, and can be reversed by exposing the unaffected wood underneath. For example, the flat top of the tongue drum, below, takes a quick sanding and refinishing to reverse its age-browning.
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