I think you will know whether he wants the quilt after you have spent some time with him. Just observe. Does he talk proudly about being at Boot Camp? Does he have other Marine "Symbols" in full view? You need to find out how he feels about what just happened, and that will take some time, and some brother-sister bonding. After a while, you will just "know" whether or not to give him the quilt. He'll put out all the signals you'll need. If the Marines are the last thing he wants to talk about, and he's trashed or hidden all reminders of Boot Camp, etc. finish the quilt and give it to "Quilts of Valor". Then make him another quilt about his new dreams, or all the things that make him uniquely him.