If you listen to those shows where they tell you that re-finishing a radio decreases its value, then don't have it done. The deterioration will continue until the legs start falling off of the console and you can see if someone will buy it from you. If you do decide to get it re-finished, it will most assuredly last longer, be a beautiful addition to your decor and be a great conversation piece. Let's just pull it out and look in the back. Most people will come in and comment on how nice it looks or how good it sounds.
Some old capacitors are even dangerous.
Some contain PCBs which can cause health problems. Certain tubes are no longer available, but have solid state equivalents.