How to connect different surfaces together.
Lac can always be re-heated and become very sticky.
To take it into your advantage, you can work on different pieces separately, to later connect into one object.
You will need a small and precise torch, to make sure to re-heat only the wanted part without damaging different areas.
Another option is to use a hot tool, such as soldrering iron to melt the pieces to each other.
It is recommended to heat both connections points and only then, gently press them together.