What's going on with this dime?

I found this 1988-P dime in a roll yesterday. Very weird and the copper color is very lustrous. Improperly annealed maybe (I hope) or just some kind of PMD? The last two pictures I pressed on it with my finger since it seemed like it captured the light better at a slight angle. Any and all input will be greatly appreciated as usual.

 

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Let's see the edge

 

Ok. Hope this helps.

 

I think I can answer that one environmental damage I could be wrong these guys will know

 

It does have the proper appearance for an Improperly Annealed planchet. Sometimes it's hard to attribute.

But I can say that if it were Environmental Exposure toning it would be darker than the tone it is showing.

 

im posting a 38 jeff i got a copper one and improperly annealed

 

looks like one of my copper washed coins ... muriatic acid with pennies and other coins. Fun stuff. I had a posting about how to do this about 3-1/2 years ago.
environmental damage would be my guess but I could never figure out Improperly Annealed coinage correctly as this one has parts that look rubbed off.

 

I don't think it is Improperly annealed as there would normally at least a tiny remains in some of the smaller crevices. This looks "Wiped" clean with strong acid,
although it would be almost impossible to prove ( well, except on Etsy or eBay)

 

Just toning but I do like what appears to be a thin lamination going from the R in LIBERTY to the top of his nose.

 

Looks like toning.

 

Science experiment. Soaked in copper sulfate. Then attempted brass. I've been wondering what became of that coin....

 

Okay, thanks, everybody. I appreciate the fast responses from you all!