May 28, 2021
including the negative one. To expand on that problem of getting paint onto and into the black cap and between its two parts, the key to avoiding that problem is to let the air pressure off before trying to remove the gun from the cup. Just detaching the air hose before squeezing the trigger doesn't do it, unless there's a certain weight of paint in the bag. If you have shot almost all the paint out, there isn't enough weight there to pull the bag down and air in, and you may get a squirt.
August 6, 2010
I am a professional artist in the field of fine custom high-end manufacturing and finishing. A little over 3 years ago I bought the 3M PPS system. After the first week the system became indispensable. In working up samples for a particular project, you can end up with dozens of formulations you have prepared and need several times during the process. It is so easy to set the liner aside with its lid and the caps provided in the kit, and it's ready tomorrow, or next week. I have cut solvent for clean-up by about 70 per cent. Your containers are as useful off of the gun as they are on the gun. My gun cleans up with a couple squirts into your extension, through the inverted head and it's ready to hang the next cup and spray. The fact that it is an airless system and can be inverted also means that I can mix heavier materials, flip it upside down and use it like a gravity gun. The built in filter in the lid saves me lots of time, money and waste. I can leave a hand piece on a sealer cup for days, it stays closed. All I have to do the next day is let the bag down by opening the trigger, shake, add air , purge and spray. The only trouble I have is opening the black ring after they get stuck in place. No matter how careful, lacquer thinner, paint or something gets down in there and opening them then can be a real process. If you could make and market a small flat short handle open end wrench to bite into the black ring. I would love to get one. Tommy Gioscia