1879 Indian Head Cent

I'll say G details (ED).

Verdi-care will probably work well here.

Looks like that crud is raised on the surface. Try a bath in pure Acetone if that is available in Italy. It should allow for some of it to be removed.

Experience prior to conserving value coins is essential - great position to take. However, there is not a lot of value with your Indian in its condition. I'd say it is an ideal candidate for an Acetone (100% Pure) bath and would likely clean up well. It would be a good indicator coin of what is possible. Put it in a sealed glass container of Acetone for 2-3 days, flip it a few times. I think you'll be surprised.

FWIW, I do a lot of coin conservations. The advice you received in this thread is spot on: Acetone and VerdiCare are your go to products. There are other tools/chems out there for more serious efforts but start with these two. Here is an example of Acetone and VerdiCare finishing a dirt coin that straight-graded.

Read your post, you have the right strategy and toolset in my opinion. Disclaimer though, I have no experience with verdigone.

I do sometimes start with DW but only because most of the coins I process are dirt coins. I've found that alternating rounds of VC and Acetone works great. I also throw Sodium Sesquicarbonate into the mix frequently alternating all 3. However, I never run it stronger than 2.5% on coppers and 5% on silvers. I recently wrote a blog post on it if you'd like to have a read.
https://www.prodetecting.com/blog/c...-alkali-wash

Honestly, it is just what works for me. Not a definitive answer for conservation by any stretch of the imagination.

Oh wow, yup those other 2 are not going anywhere. #2 is pitted bad, corrosion has done its duty on that one - nothing will come of it.

I think #1 is a great candidate for practicing spot application of verdicare on the obverse. The coin is toast anyway but you could certainly get some experience from the obverse.