I have some old Z-Spar Flagship varnish that I used on my Pygmy Artic Tern which I finished in 2001. I bought a gallon and didn't use more than a quart so I put the remainder in glass quart jars with just a normal screw top lid on them. I just finished a Pygmy Osprey and wonder if I could use this varnish on it or if it had lost its UV protection over the years. I could thin it to make it easier to roll and brush on but wonder if its any good after 7+ years.

Charles Robinson