First the upvc needs to be cleaned, ensuring all grime and any moss is removed, this is done using a upvc cleaner. Once the upvc is cleaned, we then lightly key it. We will then mask the area around the windows. If there are openers, we open these and mask inside, ensuring no over spray can enter the house. This eliminates any lines being left when you open your windows. Once the paint in is dry, normally about 10 minutes we then de-mask and take our all the paper away to be recycled.