We started with 80 grit, as this boat has been painted 3 times in it's life.
The last time was pretty rough, as the brush strokes are very visible.
After the rough paint was off, we went down to 220 and then 120 grit. I do not think that we need to go down to bare aluminum.
I think that we are going to keep the snaps that were used for the top, as it will be too much work to remove and plug them.