Should I dip a Platinum Proof or sell for bullion?

Rarity

I bought the 2007-W $100 Platinum proof yesterday and upon 5x loupe, I could see the shield area having dark color. The coin seemed to be handling by hand by someone. By the way, the sale was final and the coin could not be returned. It came in a 2x2 without having box or COA.

Now I'm thinking of getting the acetone and dip the coin for 30 seconds or so or sell it for bullion ($1300).

Will the dark area go away - never dip any coin in my life?


If you own this coin, what do you do?

SilverEagles92

Will you lose money if you sell it for bullion value?

If yes, dip it.

MrOrganic

do the research to see if acetone responds they way you want with platinum

Rarity

Silvereagles

Yes I'll lose money if I sell it for bullion

Rarity

<< <i>do the research to see if acetone responds they way you want with platinum >>



I wish I have a platinum bar to do this experiment on but I'll look into it. Thx.

garsmith

Don't sell it or dip it; use it for a give-away here of the boards

Type2

Post a pic how dose it look?

Rarity

<< <i>Post a pic how dose it look? >>



Pics are here. Obverse and Reverse

CoinCrazyPA

<< <i>Don't sell it or dip it; use it for a give-away here of the boards >>

adamlaneus

Platinum does not tarnish.

What you are seeing is one of two things:

1) It's in the metal of the coin, as in deformed metal. A little bit of handling and a frosty area can darken due to wear.

2) It's superficial dirt. Acetone should remove it.

Give it a dip in acetone and cross your fingers.

Heck, I don't think that full strength eZ-EST will do much to platinum. But I don't have one to try. Never heard of a 'toned plat'. Interesting.

jmski52

I haven't seen it on any proofs, but some of my 2007-W burnished Plats have stain-like dark areas.

On some of my burnished Plats, some of the fields almost looks "sintered" or burnt, but I don't see how that could be the case. It might be a striking phenomenon caused by the fact that platinum requires higher striking pressures and that my burnished surfaces or your shield are not mirrored surfaces but are a rougher surface where the metal is harder to displace during the strike.

I haven't put any of mine into acetone, but someday I might give it a shot. I don't think that it will change the appearance, because I think that what I am seeing is some anomaly in the metal itself, possibly caused by refraction of the light.

Acetone is not a dip. I think that it's unlikely that acetone would affect a Proof Plat in any way. Win, lose or draw - it's a risk, and it's your decision. Let us know how it turns out.