Hi Paul you would need to say what type of worktop you have, granite, laminated chipboard, solid timber etc and what state the chip is to get a specific answer but, each type can be 'bodged' to a certain extent depending on the size of the damage, using fillers, colorfill etc, but they are not miracle repairs like the resin they can repair car windscreens with, more just disguising the damage.
yorkshire chippie, October 2008