This video clip shows how to scribe a circle onto a curved surface.

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Notes :

• Use a good template to guide
• Tape down the template
• A scriber cannot be used to scribe clean circles
• Use a sewing needle
• Go light, slowly and gradually deepen the groove
• Sand off the excess plastic
• Use an old toothbrush to remove the plastic dust
• Use liquid cement to 'dissolve' and clean up the edges