I have a 68 El Camino SS396 that came with the protecto-plate, owners manual, etc. in the original plastic pouch. The problem is it god wet at some point and they re all stuck together. I can sill thumb through the owner's manual and warranty book pages but the cover pages are stuck to eachother and I would like to get them apart. Any ideas? Steam, etc? I have attached a pic for you visual thinkers

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Any input is greaty appreciated,
Jason