Abstract: The present disclosure provides a method of fabricating closed-molded translucent fiber-reinforced plastic (FRP) material and parts for use in various applications, such as for use in waterslides and architectural fascia and signage. The method includes: (a) providing a first mold half mateable with a second mold half to define a mold having an internal cavity; (b) disposing a glass fiber pre-form within the internal cavity of the mold, the glass fibers of the pre-form having a preselected refractive index; (c) selecting a transparent thermoset resin having a refractive index when cured that is substantially similar to the refractive index of the glass fibers of the pre-form; (d) injecting the thermoset resin into the internal cavity of the mold until the void space defined within the internal cavity is substantially filled with the resin; (e) allowing the resin to cure; and (f) removing the part from the mold.