not all skis have rivets.  thats how they are on enemies, yes, but on my skis its 2 in the front one in the tail, and on like spks its 3 in each, its all dependent, my other skis dont even have them.
and yea, like everyone else has been saying, delamming is when th layers of the ski seperate, and it can make the ski unskiable very fast, happened to a pair of mine, andit sucked