[MassHistPres] plaster restoration

[Linda Miner]

Recently purchased an 1820 antique and discovered the original 9' plaster ceilings under the newer ones.  We would like to keep the original ceilings but trying to weigh restoring the old vs. taking them all down and putting up blue board and new plaster.  Their current condition is pretty bad.  Wondering if anyone has a resource for lath/plaster restorers and whether an old look can be achieved with  today's products.   Any experience with this would be appreciated.  Also,  what kind of cost differential to expect if going the restoration route on this.  
Thanks.]