I painted my 1965 Evinrude Fastwin over the winter back to as close to original as I could. I sanded bare areas and roughed up the old paint. I then primed it with zinc chromate before applying 2 coats of auto paint. After the paint dried for a week I applied a can of clear coat. I then put a couple of coats of wax on it. My first trip into saltwater produced salt spots all over the leg of the motor. I cant imagine what I did wrong? Whats the difference between car paint and outboard paint? What are your experiences with both?