Ryuben,
Those are too good looking for panels man! If I were you, I would look for some dummy VU meters, or maybe even cheap compasses to stick in the holes. I know that would cut down on the side exposure, but it would look like the most killer huge vintage wooden-sided preamp with 50 channels that anyone had ever seen!
Just think what client talk would spread about what you have........
Seriously though, those are way nice