St Gaudens with fine white powder

Love your answer

 

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Giggles

 

That would be Kurt’s choice

 

Far be it for me to answer for someone else, but I'll give this one a shot.

Disclaimer: This is only a reason @charley might have answered the way he did. I'm not saying this is my reasoning for the white powder.

When shining metals people often use polishing compounds. These compounds are sometimes referred to as putty or clay. During the polishing process the 'offender' in this case may have missed tiny bits in the crevices between the fields and the devices.

 

Yet, here you are. Same old steve27 Marguli, just 20+++ years older. Deflection.
Best we agree to mutually leave the Field Of Putty War.

 

I've both seen and heard of collectors that pressure air blast with talc to remove marks or discoloration. It's like a mild sand-blast, but with talc.

 

Yes.