I left the Scout trooper as is and didn't give him a full custom paint job.
However he is weathered in accordance with continuity with the rest of the diorama.
The Speeder bike was customized some what with customized handle bars, shortened foot pedals and the wires for the gun and handles.
The Diorama base is a combination of Vallejo mud, and mud + grass which is thick paint with flock in it.

I also used the Army painter wasteland tufts and green grass for the flock and flowers.

Enjoy.