I'm looking to plaster over the face of a microlam and adjoining portion of a wall. I have been searching for some plaster (blue) board to install over the beam and planned to apply 2 coat plaster to blend and adhere to the existing lath and plaster. Only problem is no one around here stocks blue board anymore. My question to all of you is - Has anyone ever applied plaster over cement board. My guess is that it should work but I would like some confirmation. Are there issues on storing the plaster board? I thought 2 coat plaster was making a comeback but you need the right board to apply it to, so maybr it's phasing out again. Thanks for reading this and any input from anyone is greatly appreciated.