Hi there. I'm now on my third Volvo 440 (so I guess I like them), however does anybody know if anything can be done about the white (well a sort of creamy white) sliding heater control buttons. On all the 440`s I have owned & others I have seen, they have looked unsightly with the plastic being dry, crumbly & discoloured. Are there any replacement buttons that can be bought or is there any way of improving there appearance? (possibly paint), as at the moment they spoil the look of a dashboard in good condition!:-( Cheers, Stephen