A protective flexible trim molding strip for attachment to an automotive body fascia panel. A plurality of metal gromments, each in the form of an eyelet tubular sleeve, having their outer circular head flanges cemented in a recess on the back of the molding strip. A retaining metal disc is received on each sleeve free end by means of a centrally located hole of a predetermined diameter for close contact with the sleeve outer diameter. The sleeve free end is compressed by a suitable tool applying a transverse pinching force. This force laterally expands the sleeve providing a bulbous portion capturing the disc to retain the plastic strip on body panels of varying thickness while obviating dimpling of the strip.