Model Art is a Japanese publication that specializes in different aspects of plastic modelling. They have a monthly publication that covers all different genres, but also they publish special issues focusing on a specific topic. In this case how to improve your airplane models.
Be aware that all the text in this special issue is in Japanese. Still the step-by-step pictures are self-explanatory and if you install Google Translate in your smartphone, you can get a machine-based translation for the images captions.
This special issue has tips and techniques being applied in the following airplane models