If its just a single color, they are easy. Anybody can do it. Its a pain in the balls to do a two or more tone ano. I've been practicing and learning how to do two tones. Single colors almost can't be screwed up. As long as you prep the surface correctly, let the part cook for the right amount of time and use a good dye then it will come out great.
Stuff like this won't come out well because of how beat up it was. I took out all the scratches and dings I could be I wasn't able to get them all. I did polish it before the ano and that helps a lot with the finished product.