I have tried the Angelwax as suggested. It worked well, maybe too well. In next to no time the top sticky coating of plastic was gone, leaving a grey smooth plastic. So my plan is to removed the side filler covers is prevent them getting covered in black streaks of plastic, Rub down all the smooth sticky plastic, and then cover the texured sticky plastic with fake molehair to match the door cards (just have to ensure the airbag to not compromised). That should be easier than removing the whole dash.