Brass in dies

[colonyfirearms]

I got all of the brass out.
Did I spend more time and effort on it than the die was worth. YES
It became a challenge. And I learned some thing along the way.
The die is steel.
To remove imbedded brass
Scrape all the brass out that you can with a knife.
Put brasso on a shotgun bore swab.
Use a lathe or drill and work wet swab back and forth in die. Keep wet don't let it dry out.
The brasso is reactive with the brass and will remove the small amount left.
Use a new swab with metal polish. and rework the inside of die.
I used diamond paste.
This will polish the die, mine now looks chrome plated.
I checked and the diameter is still on size.
It appears to me that I should polish all new dies before using.
Is this a good idea?

Thanks for all of your help and suggestion. I could not have made it without your help