I have a 300 year old ice house, 2 stories which I am renovating. The bottom floor has an old [I don’t imagine it’s 300 years old] coating which  I guess is plaster. It’s pretty rough in many spots and I’m thinking of replastering the whole thing. I’m fairly adept at mud work and have made the walls on the 2nd floor look pretty good, but have done no plastering……… So what is the best process. Do I need to tack a steel mesh to the walls for adhesion? There are spots of mildew that I assume I’d hit with bleech.The moisture problem that comes with having a flowing spring in the floor has been “solved” with vapor barrier/insulation [w/vapor barrier] /another vapor barrier /4″-5″ of concrete. Overkill is a good thing! Whataya say folks – what’s the best approach – Oh yeah, not interested in framing/drywall over the existing walls. Want some semblance of “old” kept.  thanks for your input