Compatibility is not an issue when applying TotalBoat Aluminum Boat Paint directly to fully cured latex primer. The latex primer should be cured for at least 5-7 days before applying Aluminum Boat Paint.
The cured latex primer surface needs to be clean, free of any contaminants, then lightly sanded smooth before applying Aluminum Boat Paint. It should be understood that latex primer is much softer than Aluminum Boat Paint, and the Aluminum Boat Paint will cure to the exact texture of the surface of the latex primer underneath.