My church is trying to raise 35k to replace the exterior lexan windows protecting the stained glass. I'm hoping to save the church money by restoring the windows myself. The windows are extremely oxidized but I was able to restore a test spot by wet sanding with 1500 grit then 3000 followed by plastx. Even though it worked I'm not sure if this is the correct procedure especially over a large area. I was told to try a plastic cleaner then a plastic polish but was hoping to gain some insight before purchasing. Any help would be appreciated. Thanks, Brandon