So I found an old cardboard/posterboard Coke sign up in the rafters of a garage the other day. Because of the graphics, I just couldn't leave her to rot. Anyone have any experience with cleaning the dust/dirt/mud off of the sign without damaging the graphic. Didn't know if a damp cloth is the only way or something else. Would love to clean her up and hang in the workshop. Sort of reminds me of Betty Drapper off of Mad Men.

Also, any info on the sign would be fantastic! I don't have any experience in the Coke department.

Thanks

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Looking for any Alabama based globes and advertising such as Coastal, Rebel, Interstate Oil, Foster Oil (supertane), Mutual, Oil Well, etc...