Malvern Incinerator, Worcester. 8th September 2019 Malvern Incinerator, Worcester. VariBlast are being employed to carry out surface preparation to Sa2.5, followed by the application of a Sherwin Williams primer, 60minute intumescent and top coat paint system. Share: Older Post VariBlast is on Builder’s Profile. Newer Post The iconic Bullring Link Bridge is complete.