Mu gushushanya imbere, hazakoreshwa amabuye asanzwe yubakishijwe amabuye asobekeranye. Hamwe no gukundwa kwuburyo bwa wabi-sabi, abashushanya barushijeho gushishikarira gukoresha ibikoresho bisanzwe mumyaka yashize. Nyamara, ibuye risanzwe rifite ibibazo byinshi nkibikoresho fatizo, ikiguzi, ubwikorezi, nubwubatsi bigoye kubikemura. Kugaragara kw'ibuye rya PU birashobora gukoreshwa nk'igisimbuza amabuye karemano kugirango ugere ku ngaruka za "mpimbano nukuri".