Does mod podge work on cork?

Try putting a small spot to test it and see if it harms it. That is the best way to know if it will harm the old cork. I don't think it will, but why take a chance by not testing it.

Thank you, Nancy! Good idea.

I certainly agree with Nancy Turner - try a test area first. However, I would add that brown paper bags are pretty heavy paper to be working with and I think you might need to soak it in water before applying. This will help you get smoother edges and make it more mold-able (is that a word?) to the form. Also, this is a rather large piece and I'm certain you will use lots and lots of Mod Podge. Might I suggest you also try my "Mom Podge" recipe for a test area. I think you will be pleased. By all means report back to us how it goes.

https://www.hometalk.com/diy/paint/mom-podge-the-mother-of-gesso-and-modeling-paste-34374501

By the way, if the brown paper bag==>cork doesn't seem to work out then try my slurry recipe and cover with a light weight fabric first, then apply your BPB w/Mom-podge. This stuff sticks to anything but plastic. I'm working on my fourth project using this slurry.

https://www.hometalk.com/diy/decorate/rooms/molding-fabric-into-wine-plant-holder-33885295

Oh, what the heck! After you've done all that checking might just as well check out my small version of the body form.

https://www.hometalk.com/diy/decorate/rooms/steampunk-my-favorite-art-form-31363963

Please excuse the self-promotional commercial. However, I can see so many possibilities and I don't want you to get discouraged if one fails. I love working with body forms and you have a great idea for your starting point.