I agree Andy, but compared to, say, a Spitfire, it is, as I mentioned, relatively thick. Once the upper and lower surfaces colours are applied to a 1/48th scale model, the contrast of the demarcation goes a very long way to hiding the apparent thickness, and personally, with this particular kit, I don't think it's worth the effort, and possible risk, to try to thin the trailing edges.
Unless viewed precisely edge on, an unlikely situation for a model on display, the thickness of the trailing edges, already 'camouflaged' by the paint contrast, will not be noticeable.