I know you can bake it in an oven or heat it with a heat gun but what about a hair dryer (blow dryer?) I don't have easy access to an oven or heat gunMy sculpture consists of armature wire, aluminum foil, and a layer of sculpey over that.
build your barge in a cone shapethe pennies on the bottom provide weight for stability just remember that if the barge is to be pulled to build the end toward the pulling vessel slightly higher to avoid water intrusionactual construction is easy just role the foil to build a cone of the desired sizethen secure it with a little tapeit will both work and win for originality.
I am a polymer clay artist and the answer is sadly noIf the lack of an oven to bake them in is the issue I suggest going to goodwill and buying a used toaster oven.You must clean really good it first as any grease will mess with the clayI have baked pc in a roaster bag , like you would bake a chicken in, in my oven for larger pieces, this way you won't mess it up or make it have that baked pc fume smellMake sure you use an oven thermometer as it is important that pc bakes at the suggested tempI hope this helped.