I'm hoping the end is near for all of the sanding I've been doing. The bottom is painted with six coats of VC Performance Epoxy by Interlux. I bought a gallon kit but a quart kit would have been plenty. This stuff goes on very thin. I recommend roller only for the the first three coats and then roll and tip the final three. This knocks down and fills the orange peel that accumulated during application of the first three coats. Now, I wet sand (without going through the paint) to 800-1000 grit. The result is very smooth. I'm hoping to have top coat on sides of boat finished by New Years.