It seems to me, you might spray a product with the screen and have absolutely no issues. You might also have a little hogher viscosity with the next product you spray and have an issue when you least expect it. The screen is of no use for material that is properly mixed and filtered anyway so why take a chance? It just seems to be a no brainer to me.Because if I set up the gun with a full liner and it sprays in a particular manner, and it sprays in the same manner when the liner is almost empty, how can there be a flow restriction? If there were, I would get dry spray.
I will not be spraying with the screen in.