Remove all the parts you don't want painted, have plenty of tape and newspaper for the glass.
Most of the work is in prep time, depending on how you want it to look in the end. Also get a handle to shoot the cans with. Creates a much more finished looked. And less finger fatigue.
I sanded, fixed dings and dents, wiped it down. And on mine I used Duplicolor Spray on bed liner. I like it.
I have looked at quite a few rattle can paint jobs that look nice.