Precedent Huntsman 461/2 Inch
Glad the steaming worked for you, as to a sealer, what about acrylic varnish, thinned 50% or more, then brushed or sprayed on. The thinner the first coats the quicker it sinks in, then change to thicker coats to cover the grain etc.
Got mine from Homebase but B&Q or similar would work.
Is your Huntsman wood or Glass fiber hull, if wood then get a medium size tin, it goes a hell of a long way once the fibers are sealed, plenty of sanding in between.
Regards
Mark