Is about the best way to dry the skin and kill osr parasites. I did it with my tail feathers and wings from a big rooster and they turned out just fine. I only use borax but the salt will speed the drying process.
If you have full capes or large full skin sections and don't want a them curled up then stretch them on a board, tack it down stretching it out and then salt and borax it. Same rooster I got had a really big cape also and this worked perfectly also.
I love taking my kids fishing, now if I could just manage to fish at the same time.