I have used duponts nason implement paint many times on boats and have never had a problem. I do add a enamel hardner called "wet Look" it makes the paint dry faster and harder and also gives it a glossy look similar to a clear coat.
the engine has been sold out of this rig as it is a salvage. interior is destroyed hull is in great shape. I have access to a 200 hp merc so Im
considering the conversion. plus I could use the space for storage, rear deck etc.