Absolutely. We do it all the time.
The problem you might run into is the profile that they were previously cut vs what you might need for your track.
If they just need resurfaced, you should be able to do this yourself, or have a buddy who races help you out for something cold to drink out of your cooler on race day.
Shops like ours can do this work for you, but at a cost.
Depending on the condition of the tire, $5-$10 ea to refinish.