Lime Wash Prep CoatFor interior use only our Limewash Prep Coat is a fast to apply, matt white preparation paint specially formulated to create the ideal base coat for Bauwerk Limewash Paint. Use on previously painted walls, where a fresh new surface is desirable. 1 litre will cover approximately 6 square meters. How much paint you will need for your project is automatically estimated when you start to add paint to your basket.