Help. Which material corrodes to red? Confirm if authentic!!

[kabl]

Holy shit,
Did I write in German?
I'm getting old, sorry...
Thanks Aldo

[Aldo]

LOL, I thought you were making a better point in German.

[michaeldeb0rah]

Kabl, Share the translation if you will.
Also Al, thanks for clarifying that the steel is covered with silver paint so I won’t destroy it.

[michaeldeb0rah]

I apologize to each of you. I see Al that you sent his translation. I’m looking from my phone and didn’t put what transpired in proper perspective. I thank you both!!