REPLACE THE CONES AS SOON AS POSSIBLE!!!!!

You may get a few miles on your wheels, but any time you get "pitting" on your cones, your hubs are on their way to self destruction. If you mix new bearings and pitted cones there WILL material worn away due to friction and heavy wear at the damaged areas and the metal shavings will pitt your hub races, sometimes very quickly. The next step in the Self Destruct process is pitting on your bearing races. Unless you have Campagnolo hubs, that have replaceable races, your are risking having to buy a new hub and re-lace your wheel. I've seen too many wheels "go south" from people trying to "get a few more miles" on pitted races.
I almost had to walk a long way home a few years back from "trying to get a few more miles". By the time I got home the wheels would barely turn, and the cones where ruined. ( I had to buy new hubs and rebuild the wheels, or did I have to buy new wheels?).

If you MUST use the pitted races, position the pits on "top".

You can sometimes "polish" the pits out, but if they're very deep or if you're not extremely careful, you can have "fit" or uneven wear problems. Cones usually cost less than the time and trouble it would take.

Is getting a few more miles on some obviuosly damaged, (probably fairly inexpensive), cones worth risking your hub?

Ride Maintained
Pat