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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 'end-caps' to seal the tanks are supplied on sprues under the front mudguards. Please note, the supplied models are not comparible to an injection-moulded kit and will require a reasonable amount of cleaning and preparation depending on the level of detail and finish desired. My thanks to Mike Ozosky for the pictures of his 1040 & pup combo using my models.