Umnatha oncamathelayo wentlanzi wenziwa ngentambo yoxinaniso oluphezulu lwepolyethylene njengemathiriyeli ekrwada kwaye inokumelana nokudleka okuhle.Ikhubaza kwaye iphuke kwiqondo lokushisa elingama-30 ° ukuya kuma-50 °.Ubomi benkonzo obuqhelekileyo abukho ngaphantsi kweminyaka emi-5.Ikwalukwe ngomsonto wenayiloni ocacileyo nocekethekileyo, kwaye ibotshelelwe ngeentsimbi zelothe kunye nezinto ezidadayo.Ayibonakali xa ithelekiswa namanzi ngokwentelekiso, inokuthamba okufanelekileyo kunye nokuqina, inokuqina okuphezulu kunye namandla acinezelayo, akulula ukuyiqhawula, kwaye ihlala ixesha elide.I-Abrasive, ubomi benkonzo ende, yomelele ngakumbi.