If I can be 100% honest, I would leave the coin as is, The coin has a beautiful obverse
, but is slightly porous and I don't think that repatination would greatly improve the look
both processes are reversible. Actually dellars is fairly more difficult to remove than Jax but can be done , but involve ( my easiest way ) a dremel and brass bush under running water, and scrapping between the letters. this gets more difficult with porus coins.
in your case ( and this is only an opinion ) if you do decide to repatinate the coin, I would use Dellars
but as I said, your coin is beautiful the way it is and I would leave it. but I am curious to hear the comments of others on this one
in the end, it's your coin, and only you can decide what course of action to take.
P.S. If possible, play with jax and dellars on junk coins before attempting the sestertius
to see how it works and reacts,