I have used FTP for all of my arrows without issue. I only shoot aluminium and have fletched dozens. I use them in Canada year round in rain, snow, cold and hot weather.
I decided to try out Saunders NPV on some of the arrows I was taking elk hunting in Colorado, mainly due to the good reviews.
I prepped and fletched the arrows the same and did most of them with Saunders and did four with Fletchtite Platinum, just in case, and I was glad I did.
I ran into wet and snowy weather and the fletch fell of the shafts that I used the Saunders on. I was really disappointed. The glue line, that had set for three weeks, turned cloudy and the fletch came off.
The other four fletched with FTP were fine and I supplemented them with some shafts I had brought for stumping and grouse.
Suffice to say, that was it for me and Saunders...in the trash.