Yes you can, just tweak with the Vertex Coloring action, that's all you need
But you have to experiment it, one by one.
Here's a test map where you can multi-test it without having to quit and re-test the map
Press ESC button to start experimenting
Each press, a variable will increase by 1, it will affect the unit's transparency
You can press and press and press it, until you get the same result as the unit to the right (banished unit)
You should download the test map first, and test it.
Remember, ESC button, keep pressing it until you satisfy.