SET_DEFAULT_PART_REFLECTANCE_SPECULARITY sets the default mirror power of new parts.
---->(SET_DEFAULT_PART_REFLECTANCE_SPECULARITY)----|power value|---->
The value you enter must lie in the range 0 to 1. Value less than 0 means to use the global default specularity
SET_DEFAULT_PART_REFLECTANCE_SPECULARITY 0.5