Will green poplar turn brown under a clear-ish varnish (GF Arm-R-Seal in this case) over time?
How long? 6 months? A year?
I bought some poplar for shop drawer fronts and after 3 weeks in my workshop they are still very green.
They aren't going to get much if any UV after installed. I don't really want to 'sun them' for fear of warpage, which would defeat the 'browning' if I have to plane them further after sunning.