Indlela ephambili yokuthintela ukubola kwesinyithi kukutshintsha isakhiwo sangaphakathi sesinyithi. Umzekelo, ukongeza i-chromium kunye ne-nickel kwintsimbi eqhelekileyo ukwenza insimbi engenasici. Gubungela ubuso besinyithi kunye noluhlu olukhuselayo. Umzekelo, ukupeyinta, ukwenza i-electroplating, okanye ukwenza umhlwa oshinyeneyo{3}}ifilimu ekwaziyo ukumelana neoksidi kumphezulu wesinyithi usebenzisa iindlela zekhemikhali. Emva kokuba umphezulu wendandatho yensimbi uhlanganiswe nentsimbi yokukhusela, umonakalo we-oxidation we-metal layer uya kuchaphazela ukubola kwentsimbi yensimbi kwaye awukwazi ukunika ukhuseleko olusisiseko.