The Base

A gold surface texture I found on the Internet that could be used to texture the pedals of the piano.

A dark plastic texture that I found on the Internet that could be used to texture the wheels of the piano.

A metal surface texture I found on the Internet that could be used to texture the metal bars that hold the wheels together. There is also a variety of scratch marks on the texture, which may be useful.

A basic wooden texture I found on the Internet with scratches already on the texture.

I quickly applied the wooden base texture to the 3D model according to the UV layout to see what it looks like. But it doesn't look very nice, especially when the camera is closer.

So I looked for another piece clean wood texture for my base.

I then used another piece of wood texture with a lot of scratch marks on them and turned it black and white.

I then use the 'multiply' blend mode to merge the scratch marks onto the base.

 Finally I created an adjustment layer for an overall colour correction to make the texture colour look appropriate for the piano.