I only know what we did and the results. I'd think that 12 years sitting in the sun in the tropics without covers & still servicable is pretty darn good. We used a 2 step cleaner & polish earlier on but when we left the U.S all that was available was Pledge.

The original stuff we used was a product called 'Mirror Glaze'. A helicopter pilot told me that was the only thing anyone used on helicopter Plexi. Mirror Glaze was purchased by Meguires but the same name is still used. When we ran out of 'Mirror Glaze' the only thing that was available in Central America was Pledge so we used it.

I take it back 'Don't Use Pledge'. I was wrong. Mirror Glaze might be wrong as well.

The Pledged Stratoglass still looked good though. Sometimes you just use what you can get and call it good.