In accordance with the present invention, an electroplating solution is provided for electroplating satin bright tin-bismuth alloy solder coatings in high speed electroplating applications. The method of manufacturing a bone graft substitute includes the steps of mixing powdered calcium pyrophosphate and a magnesium included compound to thereby obtain a composition, pressure-forming the compositions to obtain a plastic body; and sintering the plastic body. The DLC or doped DLC coatings coating provides a surface resistivity of from about 107 to about 1014 ohmsquare and have a transmittance that range from about 0% to about 70% less than the transmittance of the underlying plastic substrate in the range of about 300 nm to about 1100 nm. Other embodiments are provided, and each of the embodiments described herein can be used alone or in combination with one another.