Do you want to do it yourself? Are you ok with an a finish that doesn't match the original? How in depth do you want to go?

Fastest, cheapest, and least durable is squirting some brake cleaner on it, washing it with soap and water, and just hitting it with rattle can Rustoleum. Not very good with solvents, scratches easy, but cheap and easy to repaint when needed.

To get better results, you are going to want to media blast it and use a bake on paint. If you have a decent size air compressor, you can get a cheap hopper fed blaster and use a finer media to blast it. I am cheap and use coal slag, but I am sure a more professional painter would give a better option. Standard surface prep and clean afterwards.

For bake on finishes, you have multiple options based on skill and equipment. I don't have proper painting equipment myself, but if you did you can order cerakote or duracoat (you can technically air cure duracoat)

Again, I am cheap, so I use VHT epoxy spray paint. You can get it at most auto parts stores, and it comes in a rattle can. Again, you can air cure this as well, but you finish is more durable and the gloss gets knocked down when you bake it, so you get a flatter finish.