Surface Dirt and dust was removed using dry cleaning methods such as soft brushes and a museum vacuum on low suction with a net guard covering the nozzle. 
This was followed by wet cleaning the surface of the pediment with Tri-Ammonium Citrate 2% in distilled water as it was the most affective in removing the engrained dirt and did not affect the state of the oil gilding. Acetone was used to treat the water gilding.