What are you painting them with? Floetrol is mainly a surfacing agent although it will buy you a little more time. The extender mentioned slows drying but it sounds like you may be using the wrong tool for the job or are also overworking it? Is it really hot and dry in the house?
Standard tools for me and cabinets were quality 2.5-3" angled sash brush or roller. Expect to spend $15-20 retail on a good brush. I will not mention the nap roller I liked because it makes others nervous.
I did edges first, then did the flat surfaces, chasing anything trying to drip to edges as I feathered things out.