I have an entire exterior wall made from 8 panels - each panel is a wood frame of 2x6 wood with glass center. The panels are about 8'x3'.

I normally use an HVLP unit to spray water borne dyes and Resisthane plus lacquer. Since it is in the finished home, I tried using a foam brush to apply waterborne dye for color. The wood blotched badly. That panel will need to be stripped and bleached before going further.

Back in the shop I tried toning - putting the dye in the lacquer and applying it with the foam brush again. It works, but not very satisfactorily. I first put on a cote of sanding sealer and then sanded it. After applying the toned lacquer I don't get a smooth finish and, as expected, the color is not very intense - even after 4 or 5 cotes.

Dyes and Resisthane are meant to be sprayed. So, my latest thought is to build a temporary 3 sided spray booth in the room and to butt the open side up against the panel to be spayed. I will cover the floor with a tarp. The walls and top will be some thin plastic sheeting.

THE PROBLEM: I am using a Fuji 4 stage HVLP system. I intend to use very low air volume and a fine mist for delivery (hopefully it won't leave the booth.)I am a bit wary of how it will behave in the closed environment. If the turbine is outside the booth, I will be taking the air into the booth but it has no where to go after spraying except into the turbine filter. If I put the turbine in the closed booth with the spray gun, the amount of air into the turbine and out of the gun should be the same (if I remember my thermodynamics correctly). Will it balance out or will the turbine blow out the walls.

Len