i have used one for 23 years (same one, Chroix). use it in my cabinet business. i have sprayed everything from thin water born to thick latex just adjusting the air and cap nozzle. the most important piece would be the adjustable air shut off before it goes in the gun(like a regulator). i painted my 70 cuda race car (95 stealth pearl yellow)in one hour,base coat pearl coat and clear coat. only used 1 1/2 quarts base, one quart pearl, and little under 3 quarts clear. did it in my garage with no over spray at all, nothing on the walls or floor. dry in two hours top. it came out smooth as silk. why anyone would use a regular gun i don't know.