Metal Polishing Specifications
#3 Finish –
Grain finish. Also called Grinding, Roughing or Rough Grinding
Very coarse finish. The material is polished to a uniform finish between 60 and 180 grit.
#4 Architectural Finish –
Also called Brushed, Directional or Satin Finish
A #4 Architectural Finish is characterized by fine polishing grit lines that are uniform and
directional in appearance. It is produced by polishing the metal with a 120 – 180 grit belt or
wheel finish and then softened with an 80 – 120 grit greaseless compound or a medium non
woven abrasive belt or pad.
#4 Dairy or Sanitary Finish –
This finish is commonly used for the medical and food industry – almost exclusively used on
stainless steel. Great care should be taken in removing the surface defects in the metal – like
pits – that could allow bacteria to grow. This finish is produced by polishing with a 180 – 240
grit belt or wheel finish softened with 120 – 240 grit greaseless compound or a fine non woven
abrasive belt or pad.
Finish Cross Reference Chart