I very recently bought an HVLP (Earlex 5000) and used it the first time this weekend to spray a primer on some paint grade cabinets I am making. I dreaded cleaning the gun afterwords, but as a result of using a water based primer, it was pretty easy. This got me thinking that I might prefer to stick with nothing but water based finishes when I spray. If I were to do this, that knocks out the oils immediately (my preferred category). What categories of finish would that leave me to select from?