There is no "magic" paint and there is no substitute for proper surface preparation.
The top two pictures show the back half of a barn that has been sandblasted. Notice the foundation is also cleaned.
The lower part of the page shows a small barn. The roof was painted first. Then the sandblasting was done. The bottom picture shows the finished barn.
This is a beautiful little barn that the man who owned it was ready to push over. His wife objected and he finally had me paint it. They were both very happy when it was done.
© 2013 All photos by Richard Arfsten