Apply a ceramic coating for cars.

https://www.amazon.com/Adams-Advanced-Graphene-Ceramic-Coating/dp/B09KTK4KB4/ref=mp_s_a_1_3?crid=1LD0BWOMS65AD&keywords=adams+graphene+ceramic+coating&qid=1642590085&sprefix=adams+graphene%2Caps%2C108&sr=8-3

Couldn't be easier to apply. Do it by hand. No power tools required.