This equipment takes time to set up. Check for leaks with water in the reservoir, before spraying paint/stainer etc. I used wood preservative (water based) and the quality of finish/speed of coverage was great. I got hours of brush coverage done in minutes. Recess penetration was excellent. When finished rinse out the reservoir, partial fill with solvent and flush residuals out, when empty use more air to drive out solvent and dry equipment. This equipment is excellent value and fast for big panels/area at least 5 sq metres.