Up or Down

Beginners find it easier to use me when they can see me.
Experience makes it easier to use me without having to visualize me.
The elderly often require to see me when they use me.

Fingernails will often leave marks when I am used...


Hahahaha, you are probably right and knowing Uncle 'Earl' does help.
How about another photo of a different area and another clue.

It is made of wood, brass, stainless steel and calfskin with a bit of plastic...
Since most of you have gotten it figured out, here is the 'original' picture the posting started out with.

For all those still curious, here is a picture of the Banjo.