Buy it and do it yourself. The air dry type is easy to use. You can buy the product online then go to Home Depot and get a aerosol applicator with a glass bottle attached for 10 bucks. The total will be around 55 dollars for everything. If you can find someone to do it cheaper than that then go that route. I’ve done multiple projects and it’s still going strong.
Green Dragon Guns in Denham Springs. I got an upper and lower done a few years ago and he did a great job. I don't have any experience with anyone else in the area. If you do go, his shop in in the back of the house. Go through the gate. Don't knock on the front door or his wife will answer. But she's very friendly. I was far from the first person to do that and she was used to it.