You've got a great first name
I don't know about the soaking for days part, I've only soaked cards for 5-6 hours at most. I do leave them in the typing paper between the 2x4's and under the weight for a couple days though, all have come out flat and dry.
If you're wanting to preserve the stamp, I wouldn't soak it, there's just too much of a chance it will bleed or come out completely.