In fact, #1 500 sandpaper is only used for hardened die steel (above 52 HRC), not for pre-hardened steel, as this may cause damage to the surface of the pre-hardened steel and will not achieve the desired polishing effect.
Xaqiiqdii, # 1500 sandpaper kaliya waxay isticmaashaa biraha caaryada ah ee ku haboon adkeynta (kor ku xusan 52HRC), kumana haboona birta hore loo adkeeyay, maxaa yeelay waxay sababi kartaa waxyeelo dusha sare ee birta qallalan oo ma gaari karto saameynta la doonayo ee wax lagu nadiifiyo.