i have painted the exterior of a house, its rendered and by the coast, i scraped off the old bubbling paint, filled any cracks etc, then painted. i unfortunatly got a bit of rain before it dried properly and its all bubbled over the winter and pealed off, so i have agreed to redo fre of charge, what would be the best process and materials to get a complete job done, this has never happened to me before and its a bit embarrassing