Takes practice and patience to get it right. There is no second chances if you mess up you just start over. so cut the pieces you need and then use the scrap to practice with until you get it right. Watch all the videos. I know someone that tried it. I might do a gun myself here soon. The durability is the same if you properly clear coat it like the shops do. if you do not use a clear top coat expect it to ware quickly. PPG matte clear works best for me in protecting painted on or dipped finishes.
CPL holder since 1991, NRA Lifetime Member, DU Member, NICET certified
"For those who would give up essential liberty to purchase a little temporary safety, deserve neither Liberty nor safety.—Ben Franklin.”