I'm new to spraying and recently acquired an Accuspray three-stage turbine rig. I'm going to be spraying Target Coatings WB 9000 Super Clear Polyurethane on maple cabinet face frames and carcase parts. Naturally I have loads of questions about spraying and need to do a lot of practice first to help answer those questions, but I was wondering if anybody who has sprayed WB polys or similar WB products has any advice on optimal gun setup to get started with.
The Accuspray came with two sets of needle tips/nozzles and two aircaps, the 1.1mm (43) and 1.3mm (51) needles/nozzles and the 5 and 7 aircaps. According to the Accuspray manual the 43 nozzle is suited for "medium viscosity materials" while the 51 is best for "heavier viscosity materials" without giving much else in the way of viscosity specs in Zahn seconds or otherwise. The 5 and 7 aircaps, meanwhile, will give you "no orange peel" and "almost no orange peel," respectively. Based on your experiences and the viscosities of the Target EM9000 and other WB polys in general, what would be a good starting point on nozzle and aircap setups with these products? I understand that most of spray-finish quality is going to be based on practice and experience; I'm just looking for the best starting point, based on what I have, so I don't waste too much of the Target EM9000 before getting up to speed.
Also, for future reference (I'm interested in spraying lots of product now that I have a sprayer, and the various Target finishes get really positive endorsements here), what setups do you use when spraying WB "lacquers," varnishes, shellacs, paints (or the tinted Target EM6000 series)?
I'm also in the middle of putting together a shopmade spraybooth to be used in the shop. What, in your opinions, would be the minimum CFM requirement for an exhaust fan, for spraying exclusively WB finishes. I've seen a lot of numbers offered here from guys who set up their booths, from 2200CFM to 6000CFM, so I'm not sure what basic requirement would be for efficient removal of fumes and particles. Can it become a problem when you're moving a lot of air, at relatively high speed, across your workpiece, such that the fan pulls your finish away before it has a chance to land upon the workpiece?
Many thanks for your help.