Restoring faded black composite door

We used a product called OWATROLL, I think that's what it's called.
Easy to apply and restored the colour, Dark slatey blue, nicely.
Have a look on Amazon, or You Tube for ideas.

Thank you for the comment NS I will check the product out.

I don't know about this but would look at Zinzer initially. They have a terrific range of products.

If you phone or email them they will help.

Good luck.