My old guitar tech Philip Petillo invented an artificial ebony like fret-board material he called Ebinol, and he created it for some Kramer Guitars (I think Kramer), probably mid seventies or so. That neck also used a metal and wood neck with the Ebonol glued to that neck. It was pretty slick but never made it to widespread popularity. I never wanted one as metal is more apt to be cold feeling vs wood which is a warmer material. I was at his shop when he had the very first one done, and he let me mess with it a bit.
From Wikipedia Below;
In 1970, Dennis Berardi and Gary Kramer asked Phil Petillo Master Luthier-Engineer to design and build 4 prototypes of a new neck made out of aluminum and wood. When Berardi and Kramer first came to the Petillo Home Workshop, they offered the guitar to be called PETILLO and Phil refused for he knew from past experiences in the Music Industry that often one loses one's good name with such offers that are appealing when the need demands it. Petillo designed the guitar with a forked headstock. When La Placa and investor Henry Vaccaro joined forces to open a plant in Neptune, New Jersey, they needed Petillo. The first four prototypes of Kramer Guitars were hand made in 1976 at the 1206 Herbert Ave. Ocean, NJ Studio Workshop by Phil Petillo. These unique guitars were photographed for the first Kramer Brochure that was introduced at the 1977 NAMM show in Chicago, Illinois in 1976. At that show, the fledgling guitar company sold $250,000 based on the interest generated from the 4 prototype guitars. Ironically, they had no guitars since the factory had yet to be set up. Petillo helped design and set up the factory located in Neptune and proceeded to build the First Fingerboard Machine that cut the slots in all fingerboards to Petillo's Trade Secret Scales with Perfect Intonation. These designs and prototypes were kept in a guarded Safe in Dennis Berardi's office at the Neptune Factory.
By the time the next NAMM show, one year later in Atlanta, GA 1977, after Petillo organized the factory, set up, scaled fingerboards, then he was pushed out. Petillo saw things in the factory that were compromised for profit that he could not tolerate as a Luthier of the highest ethical standards. Due to extreme differences regarding payment and quality control, La Placa, Berrardi et all forced Petillo out after he had given the supreme sacrifice of his own business with Total Responsibility for completing this intense project of design, building from scratch these four guitars that were used to get endorsements from Stanley Clark and others in his home workshop, witnessed by his wife business partner, Lucille Petillo that propelled the Kramer Company under BKL to early success. Later they also eliminated Gary Kramer. Petillo did not receive compensation but instead was methodically forced out after all of his contributions that started the company. Their unethical behavior after Petillo organized the production of the first Kramers keeping quality control as a priority was unethical. Factory quality violations in Neptune, New Jersey plus lack of payment for his contributions of designing, building, and quality control along with disagreements with Peter LaPlaca and Lucille Petillo, Phil was forced out of the company. An article was written by Phillip and Lucille Petillo that appeared in the NAMM issue of Musical Merchandise Review describing in detail how these unique guitars were made featuring the construction of the Kramer Neck. (MMR Issue,October 1, 1976)
The Kramer factory was originally located at 1111 Green Grove Road, Neptune, NJ 07753 before moving to a larger facility at 685 Neptune Boulevard, Neptune NJ 07753.