In advance: Make Buzz candy plaque. Using candy color, tint 3 oz. light cocoa candy black. Using white candy, tint 6 oz. green (use green and yellow candy colors), 6 oz. gray (use black candy color), 3 oz. orange (for skin tone), 2 oz. violet (use violet and pink candy colors), 1/2 oz. blue (use blue and violet candy colors), 1/2 oz. red (use red, pink and orange), 1/2 oz. yellow. Reserve 20 oz. white. Pipe melted candy into cake pan using cut parchment bags; chill until set after each addition.
Pipe: red patches; yellow stripes; black pupils and uniform details; white eyes, teeth and uniform areas; orange face; gray uniform areas; violet helmet; green uniform areas; blue shoulder details. Chill until firm. Fill pan with 20 oz. melted white candy. Chill until set; unmold. Overpipe with black candy to define details.
Also in advance: Make cookie trims. Prepare and roll out dough. Use patterns to cut four wings for each side of rocket (flip pattern for opposite side) and four of each tail pipe shape. Bake and cool cookies. Ice and stack four shapes together. Decorate with tinted royal icing. Use piping gel to transfer pattern details to wings. Outline with tip 4; fill in with tip 16 stars. Pipe tip 12 lines across tail pipes in alternating colors. Let dry.
Prepare base board. Use patterns to mark shape of completed rocket. Cut board 1/2 in. larger on all sides. Wrap with foil.
Bake and cool 1-layer sheet cake. Use pattern to trim to rocket shape. Position on base board. Ice smooth in white. Use piping gel to transfer pattern details to cake top. Pipe tip 4 outlines; fill in with tip 16 stars.
Position cookie trims on board, attaching with icing. Insert dowel rods where candy plaque will rest. Position candy plaque on cake.
* Combine Royal Blue with Violet for light and dark blues shown.
* Combine Violet with Rose for violet shown.