Hi Ken,
You would need to take the table off, then use a long camelback type straightedge to blue up the dovetails to see where the wear is. It would then be a matter of scraping down the unworn section to get the ways straight and parralell again, then check the gybe for straightness and flatness and rebuild, there are several detailed how to's on 't web I will have a look and see if I can post you some links. It is doable, but requires patience and accuracy.
Phil