Open the cans with dough and tear along the lines. Be careful though, you do not take them all apart but leave two of the diagonals stuck together making a rectangular shape. Each piece is made up of two regular croissants. Make sure you pinch the lines a bit so they are closed.
Dust a smooth surface with a bit of flour and place your rectangular piece of dough on it. Using a rolling pin make it a bit thinner. Spread with chocolate or nutella if that is more your thing. Make a roll in the length. You will now have a long thin tube.
Using a very sharp knife cut along the length of the roll and cut it in two. You will see all the chocolate layers. Twist this into a braid and roll the braid into a round shape. Press the ends together and place on a baking tray. Repeat this for all 6 buns.
Place into the preheated oven and bake until golden and cooked through in about 20 minutes.
Make the icing by mixing the lime juice with the icing sugar. Drizzle this over the (cooled!) chocolate buns and serve right away.