Nuln Oil is a Shade Paint from the Citadel Colour Line by Games Workshop with the item number 24-14.
Citadel Shade: Nuln Oil (18ml) [24-14] - Everything Airbrush
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Discontinued Citadel Shades - Warhammer 40k - Various Colors - OOP
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Citadel Colour Shade - Nuln Oil 18ml [Tabletop Games] • World of Games
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Citadel Shade Paint: Nuln Oil
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Pot of Shade Nuln Oil paint 18ml 24-14 - Citadel Colour - Buy your painting products and accessories - Playin by Magic Bazar