St3 & St2 surface preparation at height! 3rd August 2018 St3 & St2 surface preparation at height! Working upon the roof of the Birmingham Bullring Shopping Centre, VariBlast Ltd are carrying out surface preparation & coating works to all external structural steels during a 10week programme. @ Bullring Share: Newer Post Have I missed a bit? Older Post Week 1 – Bullring Birmingham full roof redecorate.