Not to get into the leather vs paint argument, but some very nicely textured sprayable products are out there which leave a seamless coating with a little "give" when squeezed. I had Rhino-lining truck bed liner shot on mine. It's about 3/16" thick and has a pleasing texture, which by the way is adjustable to some extent by the applicator. One advantage for clowns like me is that it's very easy to drill and file when mounting instruments and switches, If I had leather or fabric, it would look like it had been in a cat fight by now..
Brian