I have some minor scratches on the barrel of my U22 Neos. It has a matte finish (not stainless). How can I touch up these scratches?

Neos Scratches

For Neos pistols with the matte (black) finish only, use the following procedures:
1.  Throughly clean the area to be touched up with acetone in order to remove all traces of oil and residue.
2.  Obtain a bottle of either Brownells Formula 44/40 Super Blue or Birchwood Casey Super Blue
3.  Follow the product instructions in order to perform a touch up on your pistol.