I'll add the long version in a link but basically don't waste your money paying some company to overcharge you for a paint job you can do yourself. Do some research and you will find it's better just to do as a DIY project.
http://koufosemergencyresource.blogspot.com/2014/07/diy-gun-painting-for-under-7500.html?m=1
http://koufosemergencyresource.blogspot.com/2014/07/diy-gun-painting-for-under-7500.html?m=1