I'm aware that a piece of wood (I forget its name) can be used to
prevent the break out as a router bit exists its cut from ruining the
work piece. I have a "breakfast bar" that needs finishing using a
router. This has both edges finished as a curve making the use of a
sacrificial piece of wood difficult/impossible. Anyone know if routing a
worktop like this will cause problems or does chipboard behave
differently anyway?

Thanks,
Jon...