Commercial Fixed Wing
Ground Event / Encounter Other / Unknown
General None Reported / Taken
Airport
Our taxi clearance to Runway 17R was C1 to C to 17R.  We didn't see C1 on the airport diagram and had to request progressive taxi.  Approaching the taxiway we finally saw it painted on the pavement; but no taxi signs.
Air carrier First Officer reported AUS taxiway C1 is marked with paint on the pavement; but does not have a sign.