Originally Posted by Old Tiger
Try a good APC, Terry Cloth and elbow grease to remove oxidization. Then a durable trim Guard like Ultima or WG. The best is G|Techniq IMO but it is ~$70 for 25 ml. It does go a long way though!
the price is high, but it's a permanent fix.
i tried my own experiment with this... half of the wiper cowl on my wife's subaru forester with C4 and the other half with various products. *applied a different product after each wash to see how it lasted and compared to the C4 side.
I washed again yesterday and cleaned the cowl with APC... from that, i applied the other half with C4 to see how much it had faded. After having the product applied for 3 months, there has been no noticeable difference between the fresh application vs the 3 month old application. There was a slight loss of gloss, but 2 hours after application the gloss from the newly applied side had dimmed down to match the already applied side.
I would be happy with it being available on the autogeek store. I would likely try other products from them.