oh sound just never heard of massborough so will look it up now and locate
Follow the line down from Swinton towards Sheffield - straight on at Aldwark (Rotherham Station) then left at next junction (Massborough) this line allows freight to divert avoiding Sheffield and rejoins at Chesterfield (via Treeton which was closed last time I was there but there was talk of it re opening).
The actual location of the depot is called (if I remember correctly...been a while) Ikkle sidings and isn't far from Manga.
The depot is shared with another company (could be Tata) but the buildings are for the sole use of DBS drivers, ground staff and middle managers.
They're a good bunch with some real characters! - even the PM is a sound bloke.
Oh, yes, one of their drivers is an Aslef CC rep so very little hassle from 'above'
As to painting loco's - well, not to put too fine a point on it - cost!
Paint is cheap, there are people working there capable of painting a loco to a high standard and the scruffy 66's are in dire need of a full industrial clean but...a loco out of service costs an absolute fortune - sweating your assets as DBS tend to means even less likelihood of the fleet ever being completely refitted.
You'll be seeing EWS plastered up and down the country for some time yet - hell, most of the drivers still wear the branded work clothing !