freezing skins

1
The World of Percussions
http://www.mycongaplace.com/forum/eng/
http://www.mycongaplace.com/forum/eng/viewtopic.php?f=14&t=4473
rhythm-rhyme wrote: If the freezing of heads works, is it then possible to freeze the head flat, take it out and then "work" it by creasing and rolling it while still frozen?