Why does the train not go through a simply hoop jet water spray system prior to departure after each loading. This way, the train/locomotives look more publicity acceptable, good house keeping, lower maintenance issues.
When you see a train covered in a thick coating of cement residue like that depicted, to me gives me the thoughts that the rail owner/client are not interested in their image as to how the 'Joe Blogg' in the street sees them. Gives a poor taste of the railways.
Take a look at the road transport industry, most of the prime movers hauling have immaculate turned out vehicles, the Drivers take PRIDE in their vehicles and gives a lasting impression of the haulage company, the best advertisement, with a low cost with a high return.