Join the puzzle pieces together and trace around them with a pencil to make a pattern. Draw a heart where the pieces join. This is the time to decide the placement of your guidelines and the colours you are going to use. For this project, I've used pastels with a contrasting bright color for each piece and a red heart.
Paint over the printed image of the puzzle with the white acrylic paint. Paint both sides of the jigsaw pieces. You don't have to be very careful at this point, but just remember not to use too much water, as you want the coverage to be quite thick. You may need to do more than one coat. Allow the pieces to dry for at least 15 minutes.
Join the pieces together again. Make sure that they are completely dry before proceeding. You can tell if they're not completely dry as the edges of the puzzle will feel soft. Using your sketch as a guide, draw the guidelines on to the puzzle.
Then take the exacto knife (cutter) and go gently over the lines - but be careful not to cut all the way through. Just scrape the surface a little, to prevent the colours from mixing.
Mix the paint colours to your desired shades and get ready to paint. Carefully fill the divided spaces with the allocated colour, according to your sketch. The carved lines help the colour blocking and create a vitraux (or stained glass) effect. Make sure you have painted all the sides and edges with paint, so it's completely sealed and water resistant. Finally, paint the red heart in the centre of the puzzle.
Once they are completely dry, punch a hole on the top part of each piece. Push an eyelet in the hole and secure in place with the eyelet punch. Feed the cord through the holes. That's it, you're done! Brand new, recycled and very romantic!