sentences:  Metal front guitars also included an engraved designs made by his friend and customer Danny O'Brien, who had started engraving plates for guitars headstock until Zemaitis himself suggested O'Brian to engrave the fronts, as well.Zemaitis' guitars became popular among rock artist and consolidated as a landmark of Zemaitis guitars.In the mid-1970s, Zemaitis made his first "mother of pearl" fronts for Ronnie Wood and James Honeyman Scott.