Coating pretreatment inosanganisira degreasing (degreasing), kubvisa ngura, phosphating zvikamu zvitatu.Phosphating ndiyo yepakati link, degreasing uye kubvisa ngura ndiyo nzira yekugadzirira isati yaita phosphating, saka mukuita kwekugadzira, isu hatifanirwe kungotora phosphating basa sekutarisa, asi zvakare kutanga kubva kune zvinodiwa zvephosphating mhando, kuita basa rakanaka mukuwedzera kune. mafuta uye kubvisa ngura, kunyanya teerera kune kuwirirana pakati pavo.