hello all, I've noticed the door panels and seat backs on my e46 are slightly faded and splotchy. I don't believe these surfaces are leather But instead leatherized vinyl. Regardless I've tried cleaning and conditioning them with leather masters as well as einzett cockpit premium. Neither of these have worked. It seems to me like they may be UV damaged so my question to you all is what can I do to bring it back to a uniform satin black. I browsed through DD and seems like nexzett vinyl-rubber extra may work. Does anyone have experience using it or have any other suggestions? Thanks!