I highly recommend the wrap approach ... my -7 is only 6 months old but shows no signs of any issues, including fuel exposure on the wings. It lives in a nice hangar.
Avery Dennison SW900. There are others and likely just as good (3M).
Added some accents recently and it's a dream to work with.
Yes, I did it myself, but the plane doesn't know that

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RV-7 Tipper
Bill (Wild) VA-165 '90-'93
Anacortes, Wa
First Flight 7/17/2021!! 200 hours 6/22

- Been there, Donated 2022