Here I have added a tree and birds to this little piece. This photo was taken before I fused the layer of wax. It's hard to tell from the picture, but the wax has a different texture before it's fused, more brushstrokes and a bit rougher.
Here I am fusing the painting with a heat gun. It is
necessary to fuse each layer after painting. Fusing re-melts the layer just painted along with all the other layers, so as it cools and solidifies, the wax becomes one body, adhering the layer.
Here is the painting after it was fused. It is much smoother and glossier.
Here I have added a tree and birds to this little piece. This photo was taken before I fused the layer of wax. It's hard to tell from the picture, but the wax has a different texture before it's fused, more brushstrokes and a bit rougher.
Here I am fusing the painting with a heat gun. It is necessary to fuse each layer after painting. Fusing re-melts the layer just painted along with all the other layers, so as it cools and solidifies, the wax becomes one body, adhering the layer. 
Here is the painting after it was fused. It is much smoother and glossier.