GRITTY PAINT

I am new to painting and I am having some problems. Last night I was shooting some primer out of a gravity feed hvlp gun. the result on the piece that I was priming came out very gritty feeling. It seemed that I could not get enough paint to flow from the gun like I wanted to. I tried adjusting the air, paint flow, And the pressure to the gun. I ran about 35 pounds of pressure. It also seemed to have a very narrow paint fan. What am I doing wrong. Lots of help is needed.
P.S.

I don't know if this has anything to do with it but it was extremly humid last night. When I was painting about 9:30 p.m. due was starting to collect on the vehicles out in the driveway.

Thanks

First, DO NOT paint when it is that humid. You cannot get good results--period.

Second, assuming that the paint was mixed properly, you should have turned the air down to no more than 20-22 PSI, and held the gun closer to the painting surface. Adjusting the spray at that point untill you were getting ideal coverage and texture.

Just my 2 cents. I have painted three cars now and seven tractors--with mixed results I admit.

It is a learning process, and every paint job I have done has come out different. I always seem to discover new mistakes to make.

Mike

Humidity will do something kind of like that, but more like craters than grit.

If it is primer, then no harm done. I would wet sand the area with 200 grit, then 400, and recoat.

Should come out ok.

I do not have any rust inside the compressor--I just drain the tank after every use or every night if used a lot.

Bigger problem is dirt in the air around the gun. I rig up a makeshift paint booth that entirely encases what I am painting in plastic sheets. There is only enough room to get around it with the gun and keep the hoses off the object.

Keep everyone else out of there, and have make sure there is some kind of exhaust fan. Even with a respirator, it gets really hard to breathe, and I find myself rushing to get done every time.

Best of luck to you.

Mike