“Toning” on gold proofs

JohnThePainter

I’ve had this $5 gold proof for many years, it’s in the original mint packaging. Both the obverse and reverse have some kind of hazy looking crud on them. This wasn’t there when I got it, the entire coin was absolutely perfect. It’s been awhile since I’ve looked at it, maybe a year or so and now I see this…..stuff happening.

Is this coin doomed? I assume the little plastic slabs are sealed at the mint?

What, if anything can I do about it? At the very least is there anything I can do to stop it from getting worse?

Married2Coins

leave it or sell it. Chemicals will remove the stain anythime the coin is removed. I suspect a chemical was on it that was invisible at first and then "turned" over time. When I see a gold coin in a slab with a blue tint, that's what happened.

jmlanzaf

The capsules can be opened. They aren't "sealed".

erwindoc

Seems like something that careful application of MS70 could take care of. You could also consider a dilute dip to see if it would help.

1madman

The coin is not doomed. Send it in to be conserved at any of the tpg companies and they can easily get the haze off.

JohnThePainter

@jmlanzaf said:
The capsules can be opened. They aren't "sealed".

I never looked at it with an eye towards opening it, always assumed they were sealed with a glue, or heat, or simple magic. How would a guy go about opening it?

JohnThePainter

@erwindoc said:
Seems like something that careful application of MS70 could take care of. You could also consider a dilute dip to see if it would help.

I’m very much an entry level collector and will have to read up on MS70. My fear would be the risks of these things in the hands of an amateur like myself. I have plenty of low grade coins already without making my own LOL.

asheland

That’s not uncommon to see on gold proofs.

Namvet69

@JohnThePainter said:

@jmlanzaf said:
The capsules can be opened. They aren't "sealed".

I never looked at it with an eye towards opening it, always assumed they were sealed with a glue, or heat, or simple magic. How would a guy go about opening it?

It's a tight fitted 2 piece capsule. there is a seam, insert thin blade and twist. Open over a cloth, good luck. Peace Roy

JBK

I don't know the answer, but is there any chance that haze could turn into an attractive color?

silviosi

You can took out this stains easy with MEK diluant. Will not affect nothing. Or send for restoration.