As stated, it varies by manufacturer and then it may have to be adjusted to tip being used as that adds another variable to the process if you have a gun with multiple tips.
Here’s something that may interest you and others who also may be reading. A friend of mine where I just started working for part-time was priming a truck using Dupont 6001S. I noticed the texture was that of cottage cheese and I mentioned it shouldn’t go on like that. He thought that was normal application. I informed him it wasn’t.
So, he handed me the gun and said, “Here, show me how it should look.” I took the gun and squeezed the trigger once just to check spray pattern and trigger action, and without making any adjustments to the gun I let instinct take over. I began laying the primer on the fender and we could see the fresh coat laying over the cottage cheese smoothing it over like it’s suppose to look.
He wanted to know what I was doing different to get that finish. I have nearly 40 years experience spaying. You name it; I’ve sprayed it more than once. When he sprayed he held the gun too far away allowing the primer to partially air dry before reaching the surface producing that rough texture. Moreover, he was moving his gun too fast accelerating the drying before application.
More often than not it’s not the product or the adjustments that produce a good or poor finish it’s the painter himself.
imp:
