Yog tias koj cov riam yog heev plooj, tawg lossis deformed, koj xav tau lub pob zeb kom nruj txog li ntawm 240 # abrasive nplej.
Cov lus ntxhib ntxoo no tuaj yeem tshem tawm qhov ntxiv rau ntawm rab hniav thiab pab koj kho sai sai ntawm rab riam chav ua mov tawg.
Yog tias koj rab riam tsuas yog xeb tab sis tsis ua kom puas, feem ntau yog nruab nrab pob zeb kom nruj ntawm 1000 ~ 2000 # muaj txaus.
Ntxiv mus, 3000 # hliav pob zeb tuaj yeem siv rau polishing qhov txiav ntawm ntug. Tab sis yog tias koj xav kom cov riam yuav muaj cov lus zoo nkauj, 6000 # thiab 10000 # yog qhov tseem ceeb, vim hais tias hom zoo no tuaj yeem tsis tsuas yog pab riam riam ua cov ntse ntse, tab sis kuj ua rau tag nrho cov ntug txiav zoo thiab du raws li daim iav. Ntxiv mus, kev pab cuam lub neej ntawm rab riam polished nrog 10000 # grit yuav ntev dua li ntawm 3000 # (lossis tseem 4000 #).
