My tips for iron-on appliques:
- Use heavy-duty wonder-under. It really makes a difference in smooth look.
- Use sharp scissors for a clean line. It helps with the not fraying.
- Warm up the piece with an iron right before trying to separate the backing from the piece. Don't make it hot, but a little warmth will help it not stick to the backing.
Want more info? Watch my video on appliques: