A paint spray gun will provide a coat of paint to the surface in a more even pattern and with less dripping compared to a brush. You can make your own paint sprayer gun from a few hardware parts and some tools found in most households.
image/text credit: The Q
In this video I show you how to make amazing and simple air paint spray gun from plastic bottle. All you need is empty spray can (make sure it’s empty before open it), and soda plastic bottle, tire valve and paint. As result you will get simple and effective air spray gun.
Using the spray mechanism found in standard spray cans and some common discarded items you can make your own spray paint. This project uses a bicycle pump to pressurize a small PET pop bottle.
And by varying the amount of pressure you pumped into the ‘can’ and the types of paint added you can produce different effects.You do not need experience in mechanical engineering to make a paint spray gun, but those who are underage should not make it without adult supervision.