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Recent communications with customers suggest the White-Strong-Flexible material is more than suitable, but does need a primer-filler (Auto-shop, 'Duplicolour') paint to smooth out the 'powdery' finish. The wheels are now 'fixed' to prevent manufacture problems. Please note, the tank 'end-caps' are supplied on sprues inder the front mudgaurds. My thanks to Mike Ozosky for the pictures of his pups and 1040 cow/calf combo using my models.