VandykeT/A

I've been looking at the little overlays for the heater controls and headlight switch. If I do get them I want to be able to go back all black if I choose and I've all ready got an extra car to get the switches/controls out of. How hard is it to swap the faces of the heater controls out if I decide to go back stock? Also the speaker covers, radio trim, and gauge trim are pewter, how bad would the silver overlays looks? Thanks