I can’t believe how great this product is. I did a hairdressers in town and had to use something that was quick drying due to customers coming in and out all day. I chose Sadolin Superdec Gloss. After raking out and filling up I went straight over the existing paintwork with this product as it’s  self priming and undercoating. After the second coat it looked ultra white and had already dried. Amazing finish.  I will use this now on all exterior woodwork.  Saves time and gives 8 years protection. Waterbased products are the future. The 2.5 litre was around £48.