Thanks for reaching out. If the wing tip has surface scratches, then it can be polished out. You will need to do it in steps. Here is a good source... https://www.aircraftspruce.com/menus/cs/windshieldrestoration.html
Windshield Restoration | Aircraft Spruce
Aircraft Spruce is a worldwide distributor of certified and homebuilt aircraft supplies.
I did have up to the 2000 grit wet and dry sand paper and I can definitely see a difference. I bought 3-4 and 5 thousand from Amazon and should be able to finish the job this week.