For extreme weathering on Japanese aircraft, I use 3 different methods. My favorite is to paint the entire plane with Master Modelers Buffing aluminum plate metalizer, then metalizer sealer. Top coat with Tamiya acrylics in appropriate colors, chipping is then done with a toothpick. The Tamiya paint comes off very easily.

Another method is the hairspray technique, paint plane with your favorite silver, apply hairspray where you want chipping to show, then top coat with appropriate colors. When dry, use a wet brush to soften the hairspray underneath to remove top coat.

The third method is the salt method. paint with your favorite silver, let dry, apply water with a brush to areas of weathering, use table salt, rock salt and kosher salt for varying sizes, the salt sticks to the wet areas. Let dry, then top coat with appropriate colors. when dry, rub off salt crystals to reveal underlying silver.

Rick,
Yes,try them all, it's a great way to learn. you can always repaint them. contrary to popular belief or myths, most Japanese aircraft did not exhibit the extreme weathering depicted on most models and profiles. most of us weren't there to see in real life and many photos are from the last days of the war of derelict planes. I paint them to more or less like the box art of the particular plane.