pls see other SA division trains like Yercaud, HYB Superfast . Its coaches are still 90 to 98 only. very few coaches are 2005 and above . SA is junk yard for SR. This train has RSA with Kongu thats the reason for dirty exteriors, Moreover it comes to CBE on friday from NZM and on the same days it departs to MAS . It returns to CBE on sat and reaches on Sun and very soon it proceeds to NZM. It has more idling time at NR rather than SR. So there is no time for cleaning exteriors. Its very poor planning by railways