I have the 1.4 fluid tip on this. I swear I just dont seem to be able to get it to spray a wet enough pattern. The instrucions say 23psi. But I cant hardly get it it to shoot PRIMER much at all unless I turn up the pressure some. I never intended to shoot paint with this gun, but I have a feeling the 1.4 size tip is too small. I have heard of others using a larger size tip for primering a car. 1.8, 2.1 larger whatever???? Your input??