X15 LINER FINISH

[Rawze]

Its not a blast process, but a deposition process ... depositing hardened chromium in a thick layer onto the surface of the initial casting ... then honed back down to create the cross-hatching, and to meet the dimensional tolerances.


Looks perfectly fine to me. All the cross-hatching and roughness is on purpose to trap oil and reduce/minimize friction.

Too smooth = no place for oil to get trapped between the surfaces+ more contact surface making more resistance, and too rough = accelerated wear of the piston rings due to a 'sand-paper' type of effect.