Texture compounds will adhere to luan panels provided you prime and paint when done. A spray texture will have the most random appearance, and you can retain a drywall pro very reasonably to apply it. You might like it better than if you try to apply it yourself. Call for an estimate, you will be surprised at the low price, and will get a nicer finish than trying to texture yourself. To save even more, tell the drywaller, you will do all the masking and painting after the texture is applied.
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