Gauge restore.

Hey I was cleaning and prepping my gauge bezel and noticed one of my gauge hands is broke off. How hard is it to disassemble and replace a single gauge? I hadn't planned on taking it apart but I would like to fix it. While it's open I may as well repaint all the hands they are really faded. What the best way to refresh the gauge faces? I looked up new gauges the oer ones are extremely expensive I may be better off trying to find a parts cluster. I have a extra bezel none of the gauges are any good they are all missing hands.