I've finally gotten a mold made for my bmw e30 racecar trunk/boot and I am starting to plan out the layers of materials so I can infuse the part.

Are there any general recommendations on how many layers and core material to use? This will be basically just a skin part (I won't be making the inner structure like was done in that mini cooper bonnet video from easy composites) that will be pinned to the car. Obviously the car is only for track use so lightweight is the goal, without being to flimsy.

Thanks for your help!

No issue doing it in two pieces, save that it will be slightly heavier due to the more surface area being open to resin and the inevitable slight amount of bridging. You will also want to use more reinforcement in the gap between the cores to make up the loss of rigidity there, which is also a touch heavier. All more theoretical issues than functional ones, again you're realistically speaking grams.