Real Good Food, the bakery products manufacturer and supplier, has appointed a new managing director for its Rainbow Dust Colours brand.David Grieve, who will take over the role from June, has 25 years of experience in the sugarcraft, bakery and cake decoration markets. Grieve was previously a marketing manager at BFP Wholesale and held a number of sales and marketing roles at Renshaw.The group acquired Rainbow Dust in January for £4m and on Monday said the performance of its cake decoration businesses have been encouraging.Real Good Food's chairman Pieter Totté said: "We are lucky to have someone within our business with the experience and knowledge that David has of this market sector and I am sure he can use this to drive forward the Rainbow Dust Colours business."Shares were down 1.29% to 49.85p on Thursday at 08:08.