Hey Jimmy before you spend ££££££s painting up your faded bumpers and trims you should consider trying the linseed oil. I bought a bottle from B&Q, cost around £3.50 and tried it out on my Brother in Laws Audi that I'm borrowing
Before

During

After

I also done the side trims and mirrors and it looks mint, just rubbed it in using a spongecloth

it does take a while to dry fully though so ideally you don't want to use the car for a day otherwise the road dirt gets on it
Hope that helps you mate
