Is this plaster?

I am sorry for my ignorance. I thought I was dealing with drywall, but when I removed part of this interior wall (built in 1972), I saw this:
http://i173.photobucket.com/albums/w67/143house/framing/P1010273.jpg
http://i173.photobucket.com/albums/w67/143house/framing/P1010275.jpg
basically it seems like I have three layers. Inside is a gray drywall like layer, then a brown thin layer that looks like paper but thicker than paper, and on the outside a thin white layer that is like an egg shell (is it stucco?).
Along the edges or joints, I have this wire mesh (chichen wire) embedded inside the wall board.
http://i173.photobucket.com/albums/w67/143house/framing/P1010276.jpg
Anyone familiar with this? What is the best way to patch holes or finish joints to it? I would have to trim off all the wires all over right?
Thanks,
MC
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snipped-for-privacy@hotmail.com wrote:

Looks like plaster over wallboard, I have the same in my house (circa 1955), I patch fine with small holes, using regular sheet rock compound or whatever patching material says it can be used over plaster or gypsum.
For the bigger stuff (although I don't like to work with it) Is the setting type, as it has plaster of paris in it.
http://paint-and-supplies.hardwarestore.com/50-276-joint-compound-powder.aspx (they have PDF info files on the chemical makeup of each product)
for the wire mesh, if it does not have to go, I have just screwed it down and compounded over it, as it acts as the compound tape
Clark
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Clark wrote:

After looking again, I'm not as sure as I was with the first reply, (the plaster part looks thin to me) hmmmm.
I think I would still stick with the setting type compound.
Clark
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Looks like plaster over sheetrock lath or drywall. The thin top coat is either the finish skim-coat that gives the surface a smooth finish, or a thick texture paint, can't really tell from the picture, but if it is soft and flexible it is probably paint. Stiff and brittle it's a skim coat.

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I have removed a section of the soffit and now need to patch a two feet strip all the way across the top of the wall and ceiling. I don't know if regular sheet rock will match, I will have to try 3/8" sheet rock and try to match it I hope the thickness will be even.
Thanks,
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MiamiCuse wrote:

Yup that's the way it was done, a skim coat over the entire room. In my house in order to match the thickness, 5/8 wallboard was the closest, kinda a happy medium because the corners tend to be thicker etc, Good luck.
Clark
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