I was spraying some ML Campbell Polystar the other day, and ran into some trouble. In the morning, everything I was spraying looked great - nice even pattern and finish from the gun. As the day went on, the temps rose up to mid 80's, and I started having trouble with orange peel. I couldn't figure out why this was happening. I assumed it was the gun, which is a relatively new gun to me - an Accuspray 19 conversion hvlp. Since I have owned this gun, I have had a lot of trouble getting a consistent finish with it, so I figured for sure that it was the gun that was causing the trouble, except that I actually got good results in the morning.
I am wondering if others find this kind of trouble when spraying throughout the day? Do you need to adjust for the temperature? I thinned the finish a little at the end of the day, and it seemed to help some, but I wasn't sure if that was the right thing to do.
This was my first time spraying this particular finish, and I should mention it was tinted white. However, a couple of months ago I was spraying Enduro tinted white and was having the same problems, and that was when the doors were shut and the heat was on...
I am still trying to figure out if this gun is not working properly, or if I am doing something wrong. Prior to this gun I used a Turbinaire for 10 years and never had this kind of trouble with inconsistency and orange peel. Thanks in advance for any thoughts on this!
From contributor J:
I had the same problem just last week while spraying lacquer. I added retarder to slow it down and that fixed it. The higher the temp, the more you have to slow it down to compensate for the faster drying.