Four Roman Denarii for comment

I picked up these from the family of a deceases amateur collector a couple of days ago. I think I have them correctly identified, but please correct me if I am wrong or if any look dodgy.
Also, all of them have old red wax on them, which I understand was the way of attaching labels in the Victorian days. Should I remove this? Someone suggested on another forum that leaving it added to the provenance...
Caracalla Denarius S6903:

Julia Domna Denarius S6588:

Roman Republic Denarius, anonymous issue S76:

Trajan Denarius RIC60:

 

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I like all four of those denarii.
I would think that since the labels are no longer attached, you would want to get rid of that gunk on the coins. At least, I know I would.
I do wonder what it may have done to the patina underneath.

 

I agree. It appears to be a natural shellac of some sort, which should be able to be removed in just a very brief soak in 100% acetone.

It will probably reveal a bit of bright silver on those places, but it should tone up relatively quickly.

 

Now with most of the wax/shellac cleaned off using Surgical spirit (rubbing alcohol in the US).

 

That is a very handsome collection of denarii.

 

Nice chronlogical range, too, for four coins.