How do you restore something thoroughly mature? I bought a very dated piano and I want to restore...

I bought a very dated piano and I want to restore it myself. Its got greatly of scratches on it, and I want to sand it down by foot. But which kind of sand thesis do I need? How can I keep hold of as much of the original woodwork as I possibly can? I want the color to remain one and the same, if I sand it down, I assume I might have to find a go well together stain, am I correct? Any tips? I dont want a pro to do it, this is my first piano and I want to make it mine and do adjectives the work myself if I can
Does anyone collect Hummels anymore?
Answers:    very painstakingly, by hand
use the finest sandpaper,,damp
the colour is the colour
so when you,ve finished feed the wood next to a top quality grease and the colour will restore b4 your eyes