Sir I was mentioning about the Coaching depot/BBQ which maintain both GT Exp/TN Exp and also Nizamuddin Garib Rath.So it is quite obvious that the trains will have similar cleaning treatment from Chennai.Isnt it so....??? Thats why I mentioned about TN/Gt Exp,when the original discussion was about Garib Rath.All are SOuthern Rly rakes