Sandblasting logs

We are in the process of building a log home. The walls were built last year and we are now having the roof put on. As yet no windows or doors have been installed.

Now that the logs have been thru a season of weather we are ready to finish the surface and seal the wood both inside the house and on the outside. We plan to use a sealer with a clear coat.

We are looking for more information and resource access on how to sandblast the surface of the logs prior to sealing. What type of sand (grit?) to use, type of nozzle that will work best, etc.

Anyone with advise from experience or information on sources for more information is appreciated. Thanks!