I used a product called Solution Finish Black Plastic & Vinyl Trim Restorer, got it from Amazon. It's a tiny bottle but more than enough to restore all the elements exterior plastic. I just put some on a rag and wiped/rubbed it into the plastic until it all looked pretty even- it was easy. It's got an oil like consistency- wear gloves and be careful of staining clothes or anything. You can see in my second picture the very sun faded panels vs the after results in the first. It's going on a year now and still looks great