Learn Auto Body and Paint Yourself
might be a good start to learn, past that YouTube videos and articles. Really, the best way is to get the basic equipment, grab some junk parts from a scrapyard and practice. Don't let your Mustang be your guinea pig
Just keep in mind, auto painting is a bit of an art form. It's an entirely different beast then spraying some plastidip or using other rattle can products. Things like weather and WHERE you paint are crucial. For example, if you're outside and it's windy? Overspray city and you'll likely get debris in your fresh paint which will be ungodly to remove.
Automotive Paint, Auto Paint, Car Paint, Autobody Supplies
is what we used at my brother's shop for our paint supplier.
2011 V6 Race Red - Airaid CAI , BBK 73mm Throttle Body, 3.73 FRPP Gears, BBK Longtube Headers , BBK Off Road X-Pipe , Borla ATAKs , SR Performance Strut Tower Brace, MPT 91R Tune, Powerstop Rotors and pads, JLT Oil Seperator, Koni STR.T Struts & Shocks, Eibach Pro Line Springs, BMR Adjustable Panhard Bar, J&M Caster Camber Plates, Mickey Thompson Street Comps on 19" Laguna Seca Hyper Black Wheels, Several other aesthetic mods