If there was no way to remove the paper, I would mesh/skim the whole thing for my initial prep. Have you tried the old daarch trick of sanding it w 36g?
Sounds like getting the customer to sign a waiver is definitely the way to go, and stripping the remaining paper seems pointless--but I just want to put my 2 cents in about daArch's 36g method--it is AWESOME--the only way I strip wallpaper now, so fast. Thanks Bill!
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