Barrels requiring a matte parkerized finish get stripped and bead blasted before coating to give a uniform, non-reflective, medium dark gray finish. Parkerizing is the preferred finish for military ordinance and law enforcement with superior corrosion resistant properties. Parkerizing or Manganese Phosphate, is a more durable coating than stands up to the harsh conditions that a firearm is subjected to. Bead blasting is an excellent way to remove scratches and rust and hide dings in the guns steel components and provides and excellent surface for the Parkerize coating. Please note that stainless steel components will not accept parkerize coating.