I dont mean just buying a HVLP Gun and using it with regular compressed air

ailivey

Is there a compelling reason to switch to HVLP?
Some are better than others. My company was mandated to use HVLP many years ago. Initially the HVLP units tended to atomize less than a good quality conventional gun, but over the years they have improved significantly. A good painter can make a lot of different guns work.