What color are you painting the Evinrude? That can really make the difference in what you are going to get for results. The Evinrude Blue from 1996 era is the only color that requires base/clear on the Cowling & Pans. If you are painting white, you can use a single stage paint or a rattle can if you wish for the entire engine. You will get much smoother results from a professional grade paint like a PPG or Dupont product. These engines origionally had a PPG paint on them and the PPG color codes are avaliable. I wish I could find the chart I had that showed all the colors from that year and their color code. I used the Omni line of paints from PPG.
I will say that I painted the engine before I painted the boat, and if I had it to do all over again I would have painted it Evinrude White in place of the factory color repaint only because it woudl have looked much better with the boat. I will get some photos tomorrow and post them.