How to repair leappad screen coating

I purchased a used leappad ultimate, it had some scratches in the center. they were deep enough to catch a nail and visible when powered on to a point of annoying. I started light, toothpaste, then magic eraser. Ultimately, i wet sanded with 2000 grit sandpaper, got it smooth, polished with Meguirs scratch X, then a magic eraser. Scratches are much less and not noticeable when powered on. screen feels smooth. BUT, there is a coating in the area that appears to have been removed, maybe an oleophobic coating. its duller in my repair area visibly. at the edges where the coating starts it is slightly noticeable when the device is on. I was wondering if anyone thought an oleophobic kit would fix this issue?