Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

I posted the question about corner cracks to my paper model forum, a neat trick they told me is if you want to eliminate cracks, is just before you make your fold, you "paint" the back side of the part right where the fold will be with a q-tip soaked in rubbing alcohol, this temporary softens the paper and you make your fold, then the alcohol quickly drys and the paper gets hard again. This step is not necessary but may give a better looking model.