Preheat the oven to 375°F and adjust the rack to the middle position. Using a pastry brush, coat a 9-inch cake pan with 1 tablespoon of the melted butter.To make the spice swirl, combine the coconut sugar, cinnamon, nutmeg, and salt. Stir in the melted butter until the mixture is damp. Set aside.In a large mixing bowl, whisk together the almond flour, tapioca flour, arrowroot flour, coconut flour, baking powder, baking soda, salt and coconut sugar. In a measuring glass, whisk together the coconut milk, lemon juice, and 2 tablespoons of the butter. Pour the wet ingredients into the dry ingredients and stir until a rough dough forms. Let the dough sit for 10 minutes.Sprinkle a bit of coconut flour onto a clean work surface. Place the dough on the surface and gently press it into a 12 x 9-inch rectangle. Using a pastry brush, brush the dough with 1 tablespoon of melted butter. Pour the spice swirl mixture over the dough and gently spread it in an even layer. Carefully roll the dough into a 12-inch log (I like to use a bench scaler to lift the dough from the surface). Cut the dough into 8 even pieces. Place the pieces swirl side up in the buttered cake pan and gently press to flatten them to about 1 inch thick. Brush the rolls with the remaining 2 tablespoons of melted butter.Bake for 40-45 minutes, or until the rolls are golden brown.To make the icing, in a small saucepan over low heat, combine the coconut butter, honey, vanilla, and ¼ cup plus 2 tablespoons water. Whisk until the icing is a warm, smooth glaze. Drizzle the icing over the rolls. Serve warm.