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Is there a way of completely sealing a charcoal drawing on paper with spray resin varnish so that it could be handled without losing any of the detail? - Quora

How can charcoal art be made permanent? - Quora

Can you use Krylon “Matte Finish” spray as a fixative substitute for charcoal drawings? I intend to work fine details and smooth gradients, would it fix the charcoal just as good as

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