SealCoat and Transtint is an awesome tool in the bucket for toning without the challenges that sometimes come from using dye and/or stain on certain boards. The singular downside is that the color is largely "on the surface", but that would really only become evident if something was abused on purpose or used very, very heavily and is subjected to physical damage.
As an aside, I use the same transtint technique with waterborne clear on my guitar projects to do things like alter color or spray bursts.
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The most expensive tool is the one you buy "cheaply" and often...