Dear Nick;
Automotive painting takes years to learn properly. It can't be learned from a book.
You can teach yourself however.
After you have learned how to "prep" the surface, mask it. Then try painting it with a light coat each time letting each dry (flash)a little. When you get a 'run' STOP, as you have put on to much to fast.
Remove all masking tape.
Aftr drying for 72 hours you can sand it with 320 wet sandpaper until uniform etc.
If you (practice)on one fender R/R till you get it learned you will be ready for; another fender.
Do all of this in 70F weather.
Good luck, John M.....
