Questions for paint guys

[700rpm]

I am thinking about redoing at least one of my fenders. But it's been 30 years since I did B&F work, and I know things have changed. I still have my old Graco spray gun, and I'd like to use that , since I know how it works. But what is the proper sequence of current materials, and what are the current materials?

This question may be too big for this forum, but if so perhaps someone could suggest a site that would explain current prep and paint procedure?