Need advice on Restoring Guage Cluster 63'

[Isaiah92260]

Just got a 63' Guage cluster that's warning lights. I'm trying to keep my truck original but still functional to modern specs. Anyways, I want to restore this cluster, mainly my question is about the fuel guage, is there any way to restore these at home, or do I have to send it off somewhere to a professional? Also my second question about the lens, I wish I could find a glass replacement, is there any way to clean these plastic lenses up and make them look brand new? Thanks!