Grinding Machine (Wet Type) Grinding Machine (Wet Type) uses Grinding Oil as a Media to achieve a fine and shiny grinding effect on either hot or cold rolled stainless steel sheets or coils. The Machine is designed to get Finishing No. 3 (Coarse Finishing, Abrasive Grain From G60 to G150 ) or No. 4 (Fine Finishing, Most Popular, abrasive grain from G180 Or above) and HL Finishing (Hairline Finishing, Characterized by Smooth and long line ).