Body/Trim: 850: Plastic Bumper Tops - Renovate UV Fading

[ITSv40]

Originally Posted by riffbiker

Thank you, ITSv40. I have heard of Gtechnig C4. I previously applied an American plastic dye which is no longer made. Looked OK for about eighteen months but has faded and now has some smears in it. It will probably be difficult / impossible to fully remove although of course I shall degrease it with Isopropanol (alcohol). Not sure I want to rub the plastic down with wet and dry to make it smooth. So my gut feeling is the Wurth is more likely to cover over the old dye.

I might try the Gtechnig C4 on the smooth plasticised metal mouldings, eg. the roof rails and perhaps the door handles though?

Just to avoid any confusion: the plastic does not need to be rubbed down before applying the C4. I only mentioned that just in case the plastic has faded to almost white and the surface looks dead. Rubbing down with 1200 will remove all the old dead plastic and restore the surface and colour - it is similar to exfoliating. It is very, very easy to do if the condition warrants it and will transform the finished result.

The attachment shows some of my V40 trim that was treated in that manner. When I bought the car it had stood outside all its life and the bumper trim was white - the original colour is black. The photo was taken three years ago and the trim looks just the same today.