This grey-based undercoat is the perfect general preparation for adherence on walls and ceilings to be painted with Autentico Velvet or Venice. It is also ideal for preparing furniture before painting with Autentico Vintage or Venice. The grey colour of undercoat also makes painting bright colours, such as reds and yellows, easier. For blocking stains caused by a reaction to tannins found in wood such as mahogany, oak, chestnut and pine when in contact with moisture, we recommend using Autentico Stainblocking primer.