[jhorman]

It says it right in the text of the article

"An angle grinder or drill bit will cut through the outer layer of a Proteus plate, but once it reaches the embedded ceramic spheres, the fun begins with vibrations that blunt the tool's sharp edges, and then fine particles of ceramic dust begin filling up gaps in the matrix-like structure of the metal."

[SketchySeaBeast]

Ah, ok. Looking at the composition on the side seems to indicate that it's two separate metals entirely. Which I guess is the case?

[stagger87]

If you don't want to wait for someone to answer, the short article has answers for all the questions you put forth so far.

[SketchySeaBeast]

I did read the article, but I don't see anywhere it states that there will clearly be one material on the outside and then a block of proteus underneath. What they are grinding is clearly two different materials, and it stops when it gets to the second one. The x-rays and the example don't seem to have a metal outside welded on, which is my confusion - it looks like someone welded a plate onto the miracle material, when in that little image in the corner of the x-ray it looks entirely homogeneous.

Because we can't directly see the miracle material, the video feels disingenuous.