placed the foil panels on with superglue, then using the model tank itself, crushed the car.
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the car will be compressed low into the sand base of the diorama, this will allow the tank track to look almost in contact with the surface.
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I'll rebuild the rest of the car, in situ on the sand replacing bent wheels/suspension, stowage, windscreen ext
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I must say I'm vastly impressed by your creativity. What a cracking idea!