just bought some silicone paste/grease [not spray!], took a piece of cloth and started rubbing up faded outdoor aluminium/aluminum door and window frames and sommer car window wipers and other plastic and rubber, what a difference - am busy adding tens of thousands to my home value 
- at about R340 per 500gm best investment i have made in years - remember a little goes a long way…
elbow-greaseGroetnis 
Do you want to drop the product’s name? I’d like to give it a try too!
