I have used a few on my 2004 E85 with ok results. Last summer I used the Cerakote kits and holy moly - they look brand new. I'm fairly picky so even the ones that got it 95% better were just ok - but this one knocked it out of the park. Almost a year later and still looks perfect. Worked for me anyway.
https://www.amazon.com/dp/B084RQKLV8...n_title_1&th=1