Happy w/Vertglas
I used Vertglas and the hull looks new. It is a 3-step process: clean the hull with some stuff like softscrub ( to remove any oxidation or stains), wash the hull with stuff like simple green (to remove the grit), then apply the sealer with a special applicator. It all comes in a kit from Boat US. It can also be ordered from Marinestore.com. I recommend it. I did mine while the boat was out of the water. I was able to apply 5 coats to both sides and 6 coats to the stern with 1 quart ($50). A friend did his while in the water. He stood on a raft. You put on a full coat. By the time you are back to where you started, it's dry. Good luck.