I agree with Natalia - US or any unsoakable stamp should be left on paper (simply clip around leaving 2mm either side) I have yet to see any of these that have been "soaked" or removed by other means that I would put in my books. Even using benzine and scraping and dipping in talcum powder just doesn't do it for me. Stamp as is on paper and clipped looks just fine and no damage in any way. As you can see in the picture, the stamps in lower right are either damaged or undesirable in other ways (parts of envelope still on back of stamp)
Remainder of the selection is fine.
By the way, I would love to receive the Tuvalu sheet in any selection I receive. But to each his/her own I guess. And there is a "souvenirsheet.club"
Happy stamping.