i had a mate a few years ago a joiner who when i told him that byou could make a splitter from almost any thing he did a dtm 155 on a croma turbo misunderstood me a bit but it looked good. But as a model builder if you are going to coat in fiberglass i would use balsa and balsa spars or 6mm ply or even styra foam dipending on how light and how strong you want it. The balsa method can be quite fast if you have ever used it before but a bit more costly but most model shops sell med & thick super glue and 5 minute epoxy which speeds things up a bit. Also if you manage to make a bute i would take a negative copy of this as i am sure if you can be bothered could sell them. As there is sum utter poo out there at poo prices.