A single trim band can be done easily and with no glue or special tricks.

Take 12" of thread from the spool and make an very elongated "X" single wrap loosely on the rod. Tape down both cut ends to the blank in the direction, and past, where the main wrap will be. Start your primary wrap going OVER the end of the "X" (the cut end). After making 10-12 loops, put a toothpick into the area between the primary wrap and middle of the "X" and pull on both cut ends (sometimes a little at a time) allowing the "X" to close up next to the toothpick. As you start to tighten up the single loop, move the toothpick closer to the primary wrap. Toward the end, remove the toothpick and burnish the single wrap against the primary. Trim both tag ends of the "X" and finish your main wrap.

So easy that a caveman can do it!