Repairing two coins

What can I do to fix these two coins without or minimizing the loss to thier value.
1861 Nova Scotia 1 Cent (corroded?--two toned color)



1895 Straits 50 Cents (appears to have some buildup)


Chris
1861 Nova Scotia 1 Cent (corroded?--two toned color)



1895 Straits 50 Cents (appears to have some buildup)


Chris
0
Comments
FOR SALE Items
1. Dremil tool.
2. Razor blades.
3. Sand paper.
4.Screwdrive and hammer.
Chris
Those are pretty much beyond saving, I'm afraid.
Then again, that Straits 50c piece might respond well to electrolysis. You wouldn't cure it but you could considerably improve it.
<< <i> Did some looking around the house and came up with the following items I could possibly use to help them.
1. Dremil tool.
2. Razor blades.
3. Sand paper.
4.Screwdrive and hammer. >>
Ya forgot Nitric Acid! It does wonders for removing build up and corrosion! Makes many coins look shiney brand new!
Rick
1836 Capped Liberty
dime. My oldest US
detecting find so far.
I dig almost every
signal I get for the most
part. Go figure...