I have a very old, porous, fragile conch shell. I would like to paint it. Would I try to condition it with mineral oil first, or just go ahead and paint it? Should I start with a sealer?
Md Ariful Islam
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Dr. Md Rushad Rahman
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Oil will prevent paint from sticking to the shell, and oil paints will need to used instead. Sealing the shell can do the same if too thick of a coating is applied. If paint and sealant are both water-based, you can combine them and apply it in one step instead of two. Read product label or call their help hotline for an answer. Milk has calcium and can remove ingrained dirt by depositing calcium on the shell under the dirt, causing it to lift off. It may take several days, and the shell needs to be completely covered.
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