Clever saying when given as a gift not included.
1 Coat Hanger
1 Paper Clip
Keep in mind solder is a bonding material and not so much a filling material. So it can tricky to work with. Also, solder is softer the steel so it will file off faster.
Step 1: Strip a coat hanger
Use sand paper to remove any coating on a section of coat hanger. To help speed up the process I spun a piece in my drill press.
CAUTION! If you do it this make sure to hold the wire before you turn the drill on. Otherwise the section of wire will turn into a whip / weed wacker. Be careful and work within your experience.