I haven’t heard that. I restored several years ago using the time-honored t-tape and elastic strap method. There are newer “tuggers” on the market, or that you can make, but pumping is not something I’ve heard of being successful. It might temporarily fill the skin with fluid, but it wouldn’t stretch the skin in the right place or the right way. A search here on Thunder’s Place or via Google will provide you with many methods that do work if you’re interested. If you do try pumping let us know if you have any success.