I did a quick search but didn't see anything on this. How can I flatten a mint previously hinged stamp that has curled?
I just got the stamp lift sweatbox, and found I can put the curled stamp in the box for 30 minutes and it will uncurl, but the gum is damp at that point. If I try to press it with the bottom of the plastic sweatbox, it sticks to the box (which is where it is now )

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I think I May be able to steam the stamp off the box, but once I get it off, how do I let the damp gum dry without it sticking to something?
The sweatbox has been an interesting acquisition, but is definitely an advanced tool requiring some skill and practice.
Matt