Change symbology of a shapefile or layer using Python

I have a script that creates a layer and then converts it to a kmz. Is there a way to set the symbology of the layer file using Python in my script so that it shows up in the kml as the color I want?

For example, I have a layer file that displays building footprints and every time I use the layer to kml function it displays in Google Earth as a different color. I want it to display as red all the time.

I'm using ArcMap 10.2 and Python 2.7.3.

Thanks!