#As na mkpụrụ, mgbe elu pretreatment (kemịkalụ degenreasing na chemical ntughari ọgwụgwọ), n'elu ntekwasa na a oyi akwa ma ọ bụ ọtụtụ n'ígwé nke organic mkpuchi, na mgbe ahụ site n'ịgwọ ngwaahịa.
# Igwe mkpuchi mkpuchi agba nwere eriri galvanized na-ekpo ọkụ, eriri galvalume, mkpuchi aluminum, wdg.
# N'ihi na agba dị iche iche nke organic agba agba ígwè eriri igwe akpọrọ aha, mkpụmkpụ maka eriri mkpuchi agba.ma ọ bụ PPGI
mkpuchi mkpuchi, ma ọ bụ PPGL mkpuchi.
# Jiri: elu ụlọ, mgbidi, ogbako, nkebi, , uko ụlọ na ụlọ ndị ọzọ.