Product rep came to the site today and met with the painters. A little more refinement and all should be good. The heavy solids do make for differing spraying methods.

We are in need of some feedback. Here is a couple photos showing what appears to be edge flashing from a high body ceramic-Ti oxide matte interior paint. In this application it is being used on a ceiling (washable) and sprayed only. The walls are level 5 smooth and have multiple coats of the same manufacturers high build paint/sealer.

The painter is going nuts. We have spent several weeks experimenting with every conceivable combination. He has tried a multitude of tips, pressures, temperatures, humidity levels, time delays for recoats, you name it. This has been a full scale research project with great control over test conditions and a lot of persistance.

While what appears to be flashing can be minimized as shown in the photos, we have been unable to repeat a totally acceptable application. These photos were taken of paint applied in 55 deg. near 50% humidity, 2700 psi using a 515 with near 50% overlap. A very light coat was sprayed in one direction and a flood coat the opposite (which telegraphed). There was no percievable flashing for nearly 16 hours as it dried quite slow with the above conditions. While spraying the edges were flowing out perfect. We really though we hads it figured out.

These photos are certainly a worst case scenario as they are south facing and have many windows. Thank you for any insight/advice!

{{!gwi}}

{{!gwi}}

Yeah, that looks bad. It's why we backroll. I know you don't want to do that though. My first guess would be fingers on the outside edge of the fan. This would mean the paint gets applied heavier on the right and left side of each pass. I'm sure if you tried several tips and pressure settings, you are thinking that is not the problem. With a tip that is doing that though, you could just simply stand back and apply several fogged layers of paint instead of shooting it up close. There would be a lot more overspray with the fogging method, but that is just how it goes I guess. The further back you stand, the less of a factor the fingers in the spray fan will be. I would try posting your issue over at ThePaintersNetwork.com or HousePainterForum.com. This is a unique topic and there you would be able to reach a lot of spray painters instead of DIY'ers.

Here is a link that might be useful: HousePainterForum

Thank you paintguy...

I am pretty sure it is not "fingering". Seems as long as you have the pump capacity for your tip orfice fingering is easily dialed away with more pressure. We seem to be able to spray a .019 tip @ 3000psi cleanly for a max with our current product and pump.

The painter did use the fogging technique during our testing. In smaller areas it was somewhat succesfull but in the larger areas the overlap always telegraphed through.

The painter is saying at this point he would like to re-seal everything before going forward.