That is an amazing transformation. Congrats on a job well done. I've become a big fan of No Ox in the last year or two - an electrical conductive grease. I have a Wi-Fi security camera system with 12V power to the cameras and some of them I couldn't keep on line for more than a few hours at a time after awhile. Unplugging and plugging the 12V power back to them would restore their service but they would shut down after a few hours. I applied No Ox to all the antenna connections and the 12 V power plugs and even the 115V transformer plug ins in the attic and suddenly almost no problems any longer. Now I lose a camera every 3 or 4 weeks if that. I've been applying it to all my auto electrical connections.
https://www.amazon.com/NO-OX-ID-Spec...85242409&psc=1