White spots/gum deposits develop in Brazilian cherry and rosewood?

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Q: Have you seen white spots, gum deposits develop in Brazilian cherry and rosewood? What is behind the white spots? Is it a natural occurrence?

A: It is a natural occurrence. Certain compounds in the wood can react with the solvents in our finishes and turn white. I have heard that it is hit and miss, so you never know which batch of wood is going to have this reaction, much like issues with tannin in white oak with some water borne finishes. I have attached a short article from Poloplaz regarding how to deal with this.

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