§ 152. Enforcement. Before enforcing such lien, notice in writing
shall be given to the customer, and to the holder of a perfected
security interest either delivered personally or sent by registered mail
to the last-known address of the customer or holder of a perfected
security interest. This notice shall state that a lien is claimed for
the damages set forth in or attached to such writing for manufacturing
or fabrication work contracted and performed for the customer. Notice to
the customer shall also include a demand for payment.