Or use a round head brass screw in a drill with some abrasive compound to clean up the existing crowns. Cheap, and if it doesn't help you can still do a complete crown. For what the cutter and pilots cost, I'm thinking you can buy them, use them (and if you want, sell them here) for less than a smith would charge for 3 recrowns.
Thank you for that info - I have access to a machine shop and so I may just buy the tool at midway, etc. and have it for future projects - still deciding...