spraygun

First off, my main use will be to paint and clear helmets in a variety of colors to include tricoat candies . I also use mainly satin and matte clear coats but occasionally run a glossy show clear. the paints and clears I use all come from http://specialistpaints.com so I believe them all to be...

I want to use my Devilbiss Finishline 4 for clearcoating my Vette and the SPI guidelines call for a 1.4 nozzle, but it only comes with a 1.3 or a 1.5, which should I use?