baking soda paste or baking soda toothpaste on a cotton cloth can be used to fine polish this plexiglass, toyota uses very soft and easy to damage lens on their gauge clusters.
3M make a product for this and its used in the marine industry a lot for optical clarity of gauges. Its a very fine polish paste like meguairs plastX - it buffs it clean very smoothly . If you can source plastX, it can be used too. Just remember to never use a rough piece of cloth (like a towel) to clean this lens on any toyota vehicle.
If you want zubaida aapa type totka - then rub some olive oil into the glass and buff it into it - it masks the smudges and scratches.