Don’t throw away champagne corks; they have many modeling uses:

If you chop off the mushroom, it can be used as a stand for holding toothpicks or pins which can support small parts — such as wheels — for painting.

The wire cage that held the cork in place can be used as a painting jig for metal cables or chains. After unraveling it, bend it into a bow with hooks at the ends. Slip the chain or cable over the hooks. The wire retains a degree of spring so that as it straightens out, the chain or cord is held taut for painting.

Tip submitted by:
Gabriele Geroldi
San Donato Milanese, Milan, Italy