I thought I would share this. 5 years ago I finished a mahogany transom
with minwax ipswitch pine and then topcoated with polycyclic. For some
reason it has held up well. Even though it is sold as an interior
product. Wood that got the polycrylic without the stain shed the
polycrylic in a couple of years and the wood turned grey.
Could the answer be the stain sealing the wood which allowed the
polycrylic to stay on the wood?