Friend's young sulcuta has scratches on the plastron - natural heal?

[GSM]

Hi - per title, my friend noticed some marks on the plastron of his one-year-old Sulcuta. He's not aware of how it happened but noticed it after walking on concrete. To me, it looks like small marks that will heal with intake of calcium and time. But I'm no expert, so I thought I'd ask here in case. Here are images below:

 

[wellington]

I wouldn't worry about them. They should be fine on their own. Just keep an eye on them just to be sure they don't get worse.

 

[Maro2Bear]

Looks like normal growth really. Keep it up off rough concrete too.