upon inspection

Upon inspection, I see some pitting on one of the lengths of iron for this Freedom Utility Trailer.

See the difference in finishes?  Is this poor machining?  A result of welding of the end bracket?  “What a heck?”  I’m hoping this won’t be a concern later on, as in rust.  This is not Galvanized or aluminium – it’s powder coated steel.

Actually, it used to be red.

What is that?  Undercoating?  Rustproofing?  Proof of being a used trailer?  My imagination?