Thanks for the response Jim, I think all of the old enamels were alkyd even up to the 60’s. GM was the first to use lacquer sometime in the mid 50’s and even then it was reserved for high end cars like Cadillac and big Buick’s. I can’t imagine any of the outboard manufacturers using lacquer and even more impressive is the lack of primer under the enamel and how well it has held up 60 and 70 years later. Even being directly applied over the aluminum and being exposed to water without the additional aid of a UV protective clearcoat, many of these old kickers still sport their original shine and water slide namesakes.