I don't think they are illegal for home use. I still have my Binks 7 and it's been a great gun, still is. It does waste a lot of material through overspay though.
Back in the day when I was teaching woodworking, a fellow shop teacher in a sister city ditched his Binks for an airless and really liked it. I have to admit though that we all had our students rub out their finishes, so we were looking for build. His student's projects had flawless finishes when we arrived at the county/state competions. We did share the same local supplier that sold him the equipment and was our in house Chemmy". Our local Chemmy worked in/owned/store(s)/ an developed many paint and finishes. After helping the professionals for many years, he sold out to get in the chase for the development/improvement of the impending WB finishes. So In my opinion, airless can be used to spray many wood finishes with just the right formulations and equipment. Don't think I'd go that route though with the development of HVLP... or at least with the kind of help that I had available to me.
Last edited by Old Skhool; 04-30-2012 at 01:47 AM.