As bad as the bottom looked. it sanded out nicely right down to the barrier coat which was still perfect with no blisters whatsoever. I wish I had taken some pics while I was sanding and painting but I was so miserable, I didn't even think about it. For the bottom paint i used West Marine PCA Gold made by Pettit. I used this because the boat can stay out of the water indefinitely. I put on 3 coats and it took 2 gallons.