I-fiberglass roving ehlanganisiwe ye-spray-up imbozwe ngosayizi osuselwe, ohambisana ne-polyester engagcwele kanye ne-vinyl ester resins. Khona-ke isikwa yi-chopper, ifafazwe nge-resin esikhunjini, futhi igoqwe, okudingekayo ukuze i-resin icwiliswe emiculweni futhi isuse ama-bubbles emoyeni. Ekugcineni, ingxube ye-glass-resin yelashwa ibe ngumkhiqizo.