""" models.py """
from django.contrib.gis.db import models

class Airspaces(models.Model):
    geom = models.PolygonField()

""" your script """
# Import your models as usual
from airspaces.models import *

# Import the GeomField from geodjango
from django.contrib.gis.db.models.sql import GeomField

# Add the custom select field for the geometry field (this needs PostGIS to work)
qs = Airspaces.objects.extra(select={'rhr' : 'ST_ForceRHR(geom)'})

# Cast the field to the GeomField type
qs.query.extra_select_fields['rhr'] = GeomField()

# Iterate over objects as usual
for airspace in qs:
    # Output our counter clockwise polygon
    print airspace.rhr.coords