While you are on the site, in your browser find and click "Add to Home Screen" A CGN beaver app icon will then be created to your phone that is directly link to the site.
Note: This feature may not be available in some browsers.
Give it a good scrub with a metallic brush, cleaner and dry with clean patches, powder fouling will go away, after a good clean, what will be left is likely bore pitting... JP.
Looks like powder residue.
Bore brush then rags.
If this doesn't clean it up, go back to the brush
with solvent on it.
Don't forget to pull your push rod through a rag on
the way out.