planish

planish (third-person singular simple present planishes, present participle planishing, simple past and past participle planished)

1. To repeatedly hammer (a sheet of metal) so as to shape and smooth it or create a decorative indented finish.

   With gentle, overlapping blows, use a planishing hammer, first to work down the fused seam, and then to planish the entire cylinder. — from instructions for making a pewter cup

• Alphins, Halpins