As we all know, many woods change color with time and exposure to light. Some beautiful colors are lost with woods like Osage Orange, mulberry, purple heart, etc.
The culprit seems to be UV rays in light.
I was recently told that the use of a (high quality) spar varnish as is used by boat builders will stop the color change.
Locally, I found an off-brand of spar varnish for $15.00 a pint. I'm not inclined to experiment with such expensive stuff.
Anyone here with boat building experience that has used spar varnish and can comment on this issue?