Die Polish Marks On Incused Design Elements?

@coop yes thank you! as I stated in my question, this article is about proof die's being polished with a wire brush leaving a very fine impression! I would just like to see one! Do you have a link for images? Do you have an app for that, I mean hey coop do you have a link for that? LOL. Thanks coop!

I think the article is talking about incuse elements on the die, not on the finished coin. It can't be talking about the shield cent because the top paragraph starts in 1950 and the paragraph below the highlights mentions 1970.

The first paragraph in the image talks about Cameo, where a dipping process "produced a light frosting over the entire die. This frosting is also known as a Cameo. The die then was polished with a diamond dust compound. The incused design elements were not affected by this polishing and retained their frosting."

So the frosting was retained on the design elements (lettering, portrait), which is also the "incused design elements" they mention. So the "fine impressions caused by the brush" would then be on the lettering or portrait. That's where you'd have to look.

There are some business strike Lincolns from Denver in the 1950s that contain weak brush marks on the raised elements of the coin design.

None of these are terribly exciting, but one example is 1954-D 1¢ WDDO-001. The BE of LIBERTY shows weak die scratches, likely from a wire brush, on the top of the B and NW corner of the E.

There are a few 1950s Lincolns where very weak parallel scratches are visible on the angled bottom edges of Lincoln's jacket and vest, connecting to the rim. One possible explanation is a wire brush polishing, with the brush slightly angled.

I haven't seen any of these on reverse dies.