With the cold temperatures and my cold/flu I have not been able to actually get out do any work on the body of consequence ... so I spent time getting acquainted with the spray gun I chose to paint the car ... here goes I am reviewing the 3M ACCUSPRAY Paint Spray Gun System and the 3M Paint Preparation System (PPS) from a rookie painter point of view ... in other words a first-time user trying to paint his first car! After consultation with Jx2 (Jeff Miller & Kliener) and some research on line I purchased the following items: Today I put the gun end of the system together and have the following observations so far: 1. The instructions that come with the system are pretty sparse but there is plenty of additional information on You Tube and 3Ms website; 2. This is a "plastic" system ... although a hard plastic one. The gun itself is a composite with a metal needle, valves, hose fitting and pressure regulator/gage. The instructions and online material clearly warn the user NOT to soak the parts in solvent or clean with a gun washer; 3. Parts of this system are ?disposable? ... meaning that each time you use an atomizing head and the soft inner cup of the PPS, you could throw them away and install new ones instead of cleaning them. 3M does provide instructions to clean the atomizing heads for reuse; 4. The system is advertised and demonstrated in videos to apply everything from undercoating and high build primers to clear coats. The system has 2.0, 1.8, 1.4, 1.3 and 1.2 mm atomizing heads but the basic system only includes the one each of the later 4 ... so order more of each you want; 5. Unlike other guns, this one comes with just one needle valve common for all atomizing heads. The pressure regulator is called a flow control valve in this 3M world; and, 6. The system requires a minimum of 20 psig at the gun with air and paint flowing (or 30 psig without the paint flowing) and 13 scfm. Assembly: 1. Air Supply to Gun: After assembly of the pressure regulator, air filter and hose quick disconnect, that assembly is connected to the bottom of the gun. 3M warns to use two wrenches on the fittings to prevent damage to the gun; 2. Atomizing Head to Gun: Connecting the atomizing head 5 Nov 12, 2017 to the gun is pretty straight forward but is also a pretty tight fit ... because it?s plastic you have to be a little careful in making sure it?s positioned properly on the needle with the sleeve fitted to recess in the gun AND the trigger pulled to move the needle back BEFORE snapping the head in place; and, 3. 3M PPS Cup to Atomizing Head: With the assembled cup on a flat surface, turn the gun upside down to fit the atomizing head to the cup making sure it?s fully seated and twisted 1/4 turn to lock everything in place. Flip it right side up and put it on a stand.