I use small rare-earth magnets to hold underwing ordnance on aircraft. This allows me to remove the weapons load if I need to transport the model. It also allows me to change the weaponry if I want to depict a specific mission. 

I also use the magnets to hold props or other delicate fiddly bits which might otherwise be damaged if they were glued in place on the model.

During the assembly and finishing of pylon-mounted ordnance, I can build and finish it completely before I snap it onto the aircraft.

Usually a small magnet and a guide pin or two are all that is needed to correctly position and secure the item.

Select magnets in mating pairs and mark them on the exposed sides to ensure correct polarity.

Tip submitted by:
Jack BrendleMaricopa, Arizona