Usen Omni single stage urethane paint from your PPG jobber. Omni paints are 5 year old PPG tecnologies that were used as the DAU and DB line. 5 years ago they were great, why are they not so now? Single stage urethanes are sprayed like enamels and allow for sanding to remove defect. Omni or Nasons are great paints to practice on and will give you good results.