By worn down plane do you mean weathered with faded paint with ware and chips?
Tie your plane to your bumper the next time you...[X(]

You can use a rubberized type of masking such as frisket or other types or removable liquid masking to get an exposed metal look. Apply a metal color to the areas that will have ware and let dry. Then apply the masking in appropriate places and patterns to simulate ware. Then paint your top colors. After that is dry, rub the masking off exposing the metal color underneath. You can use a dry brush method to paint oil, exhaust and other color ware patterns or use an airbrush. It's all a form of art and will take some practice to get the effect you want.

Most people use glue droplets to make rivets. Draw your panel lines then place drops of glue spaced according to your subject. If you want worn paint on your rivets, paint the area with metal color and use the same method above. These rivets are not flush. If you want flush type rivets use a metal tube with the diameter of the rivets and spin the tube to cut a shallow ring effect which looks like a flush rivet. You should have glassed and primed the surfaces first.


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