I made an easel from some PVC pipe. Works good for holding flat pieces like wings and control surfaces while painting. Used it to hold the wing on my FT Simple Scout while painting a scallop on the leading edge. One more thing, the FT brown foam board is water resistant, but the poster board turtle decks are not as far as I know. So it makes sense to paint them as well either with color or clear coat. Use some double sided tape to hold them to the cardboard while painting.