Hi, Walter. You need basically the same kind of spray rig that an auto body shop would use--good quality compressor with filter and separator, high quality gun with probably a different tip than they would normally use for car paint. A way to suspend the shutters so you could do both sides at one time would be nice. A dust free environment would be a necessity. Call a pro or a good friend with a body shop. Might be a little expensive but you will end up with a much better job than you could do with a brush.