You say that your ceiling needs to be cleande, stripped and refinished. I would guess on a house of that age, that paint is the intended finish as opposed to a natural or stained finish. Sandblasting would leave the wood eroded with a pronounced raised grain pattern. You are probably dealing with multiple coats and may have lead paint. You should avoid heat stripping and sandblasting unless you first test for lead. Chemical stripping is a possiblity, but very messy overhead. I would recommend that you manually scrape off the loose paint and fill the irregulatrities, then prime and paint. The resulting coating would be smooth.
If you are seeking a natural wood look (stained), you should consider replacing the ceilings by installing T&G or shiplapped pine cedar, redwood, fir, or even a beadboard sheet product over the top of the existing ceilings.