There was a time when airplane modeling was almost totally a scratch building hobby.No kits,special paint,aftermarket or decals.It was a form of woodcarving basically beginning the same way as most 3D woodcarvers begin even today,with the band saw.Actually the band saw is a modern (?) development ordinary handsaws and ,if you were lucky a coping saw were was all the rage back then, with the average modeler building at home.