what particular spray gun?

[fordman49450]

Hello, I am going to be purchasing a textured product to do my newly fabricated bumpers. I will also do a small rock-guard strip at the bottom of my truck and re-do my fender flares with it. I want to spray it on. It tells me I need a gun with a 1/4 inch tip. Can someone lead me to a particular spray gun to do this? I am not familiar with the guns. I have a friend who does body work, he said if I Could find a gun he would do it. Here is the product, if you read the FAQ it says a 1/4 inch tip?? Thanks http://www.durabakcompany.com/automotive.htm