I agree w/ those who say not long at all (hours to days) in direct sunlight.If left in direct sun light, generally speaking, about how long does it take for wood to change color? Specifically in my case, padauk (un-sealed).
Are you sure that's padauk? I've never seen padauk lighten with UV, only darken and in direct sunlight there's no way that it will take a month.I've only finished one piece of padauk. I believe it would oxidize about the same as walnut. It would lighten the most in the first month and extremely gradual from then on. I've had a test piece of walnut sitting face up outdoors in the direct sun for the last 5 months and there is very little change in color.
It was padauk. About 20 years ago I was buying an extra board of different species every time I bought a load of lumber. I just cut about a foot off one board and put a finish on it. I don't believe it has darkened any but I haven't kept it in the sun either. As far as I can tell it's the same color it always was. I believe I still have the rest of that board. If I get the chance I will sand it off and put a finish on it and compare it with the old board.Are you sure that's padauk? I've never seen padauk lighten with UV, only darken and in direct sunlight there's no way that it will take a month.
Perhaps you have redheart ... that acts just like what you are talking about.
Interesting. Again, as I said, I've never heard of padauk getting lighter instead of darker and taking any length of time in direct sunlight to change color noticeably.It was padauk. About 20 years ago I was buying an extra board of different species every time I bought a load of lumber. I just cut about a foot off one board and put a finish on it. I don't believe it has darkened any but I haven't kept it in the sun either. As far as I can tell it's the same color it always was. I believe I still have the rest of that board. If I get the chance I will sand it off and put a finish on it and compare it with the old board.