Advice needed. What to do with valuable coins (>$1000 auction value) That are in corroded coin flips?

So my dad told me about how he had my late mother's late grandmother's coin collection in his safe deposit box. I went down to check it out, and my god, absolutely stunning collection.

There were quite a few of those small california gold coins. Some capped bust halves (Cant remember the dates of hand), seated liberty quarters (key dates), and a whole lot more like morgans etc.

I want to try to save them as best I can. What should I do? Previously I asked this sub about corrosion on some moderatly valuable coins, and it was suggested I use acetone if I'm remembering right. I was told to put them in a tupper ware, and gently rock the acetone back and fourthover the coins. It worked pretty well, but there's still some corrosion stuck in the corners around where the relief changes.

I'm assuming for more valuable/super rare coins that I should not do this myself.

I read PCGS offers a service for restoring coins, would that be a good idea for the extremely valuable ones?