Can you think of a way I can extract a paint sample from a wall without cutting a hole in the drywall to extract a piece to take to the paint store. I thought maybe since the wall is latex maybe there was a way to "peel" or "scrape" a piece of paint off the wall.

Hello all, I took over a business that has one cinderblock wall. The wall was previously painted, but we could tell something was sagging and it was bubbling in areas. Long story short, we started pulling at it and exposed a paper mural that was painted over that has allowed a lot of mold to appear. Beneath the paper mural is another paint layer (where most the mold seems to be), and beneath that is a joint compound type material that is white and easily powders off if you scrape at it. Below that is a concrete type material, and lastly beneath that is the cinder block exterior wall. Now, to my question, what is the best way to remove the layers of paint and wallpaper and mold to get it to a clean surface? Our plan was to use furring strips to install drywall for a nice paintable surface, but we don't want any moisture to get through to it, and we obviously want to handle all of the mold. Any and all help is greatly appreciated! Thank you, moparman69