There are some paper models that scream out to be used frequently, for this, other materials to strengthen the model comes in handy, case in point, all of my warhammer armor is laminated thickly and have thick bulkheads inside to add strength to the walls. As of the moment, I do not have the skills that Doris uses to make her ship hulls and avoid the starved ribs look, so I use wood strips like I would an a wood plank on plank. Restrictions limits your creativity but on the other hand, it also makes you think outside the box: another case in point, is the rail system for my ALIENS APC, which I could have done in other materials but I opted for paper and it came out OK.
Good comments from everyone, enjoy and see you all around the forum.