Re: painting an old evinrude?
Answer is there is no time limit with Zinc Chromate primer... There are time limits on some catalyst type (commonly called 2 part primers) primers but not ZC... However, before you paint your motor after spraying Zinc Chromate, you have to prime on top of that Zinc Chromate primer as well. Zinc Chromate is an adhesive to bare aluminum before using regular primers. It isn’t a substitute for other primers... It is a needed step for your primer to adhere to. So first you use ZC, then prime and paint. I used ZC, then PPG K36 catalyst primer, sanded that to a very smooth finish and sprayed PPG Shop Line base coat paint, and finished off with PPG Clear top coats... While that seems like a lot of work, the finish is amazing and so fuel/chemical proof too... You won’t have to worry about spilling fuel, oil, grease or most anything on that finish and having it bubble up or peel off...