Ok, all your filled blisters have dried (good 12-18 hours). Time to start sanding them down. Again, used my 5" Dewalt but switched to 100 grit paper discs. Blister by blister sand gently any excess epoxy. When the edge of the blister became only shaded with epoxy, I stopped. It's easy to over sand, so go slow. Going too far means another coat of epoxy, drying time, and more sanding......Yuck and......ARGGGGGGGHHHHH!!! I would close my eyes and run my fingers over the blister to see if I could detect any depressions, etc. I'd also take a straight edge and place over sanded blister, edge to edge, and see if I could see any light shine underneath. If it passed both these tests, I felt pretty good about it. After all blisters were sanded down to this point, I hit them with some long-boarding. Call me crazy, but I actually like this part. Quintesential sailor experience. Love your hull. Piece of 1x4 with three 5" sanding discs stapled to it (on the sides). Good old elbow grease. Gave them a good working over and the hull was as smooth as could be. Keel and rudder too. Attached Photo..... is of hull with all blisters sanded fare. Next episode.... Rollin' on the barrier coat. Kevin in VT