oil based stain or paint?you'll want to thin it with the proper thinning agent depending on the base ( or what is recommended to clean up ),stains are pretty thin that they usually do not need thinning, make sure for stain you have the finest nozzle, use a HLVP or automotive spray gun ( I have 5 types of guns, HLVP Auto, HLVP vacuum, HLVP touch up, a touch up and a air brush ), low air pressure to avoid bounce back, all but one 2 of my gun were brought at Harbor Freight and tools and are a good value for the money, also with oil based you need a at least a 6 -15 CFM compressor to keep up for HLVP work, and maybe 30 pounds of pressure, and as oil/ water separator is a must for any oil work as well as maybe a drying agent in the mix to speed up cure times between coatsyou also want shut off all pilots and open all windows to ventilate, or risk and explosion due to the vapor ( more so an issue with lacquer based finishes ), it also helps if you can mask off area and then make a tight plastic tunnel area of the kitchen area only with one vent going outside and that is fan assisted, this keeps airborne particles contained to the kitchen only and the flow outwards to the outside of the house