Fiberglass yateranijwe igenda itera spray-isizwe hamwe nubunini bushingiye, bujyanye na polyester idahagije hamwe na vinyl ester resin. Noneho igabanywa na chopper, igaterwa hamwe na resin ku ifu, hanyuma ikazunguruka, bikaba ngombwa ko winjiza ibisigarira muri fibre no gukuraho umwuka mubi. Mu kurangiza, kuvanga ibirahuri-resin byakize mubicuruzwa.