We’ve seen several methods of repairing plastic gears. After all, a gear is usually the same all the way around, so it is very tempting to duplicate a good part to replace a damaged part. That’s ...

Chrome bumpers made a quick exit from the automotive scene in the late 1980s. In their place are elaborate but flimsy plastic covers hiding stamped steel impact beams—with a swath of Styrofoam ...

You have a broken gear you need to fix, but there’s no equivalent part available. That’s the issue [Well Done Tips] faced with a plastic gear from a lawnmower. While we’d be tempted to scan the gear, ...

Margaret Kuhnert of DeLand wants to mend a hole in a concrete bird bath, and keep the paint inside the bowl from peeling: Use an electric wire brush to brush the inside and outside of the dry bird ...

Researchers at the University of Illinois are developing plastic that can heal damage on its own. Screen grab, University of Illinois demo Cutting-edge materials like graphene—a thin sheet of carbon ...