When you need to shape
Minicel or
Neoprene foam, Dragon Skin is the best inexpensive tool for the job. Red Devil calls it Steel Sandpaper. Dragon Skin is flexible to allow you to shape as needed. Wrap it around a 2x4 to sand flat or around a dowel for curves. We just love inexpensive things that work great.
Don't use your Dragon Skin on anything else (fiberglass, wood) as it will be dulled and will then not cut the foam well.
When outfitting a kayak, shape the form to fit your boat and body. Then use duct tape to temporarily put the form in the boat. Paddle your kayak for a while, then reshape it to find tune the shape. Once you are happy with the shape, use Mondo Bond to attach the form to the kayak.
