I have to agree with kx250rider. Most old TVs and radios got regular maintenance during their service lives. That was part of their history, and if we choose to restore them to working condition, that's their next phase in life. We --and future owners -- can enjoy them working as originally designed.
I make exception only for Very Special sets and leave them untouched. My Zenith TransOceanic 7G605 "Bomber" has never been touched, and I will never mess with it (or play it). Same for the leather-cased A600L TransOceanic which belonged to Joan Fontaine. I will leave it exactly as it was when it left her hands.
http://www.antiqueradio.org/zen32.htm
Even for a common set, I will always pay more for an unmolested original than one that has been newly restored. I would rather do the restoration to my own tastes. Let me be the one to decide whether to restuff capacitors, etc. But maybe I'm just a fussbudget
Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html