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Name: Winifred
Status: other
Age: 50s
Location: N/A
Country: N/A
Date: 2000


Question:
We have several quart containers of coins covered with residue. These coins were at the bottom of a water fountain and were given to a charity; not for a collection, but to cash in for face value. Do you have an easy solution to removing the residue?


Replies:
Ms. Johnson,

Since you did not describe the residue, I shall assume it is either algal or hard-water scale. Swish the coins around in Clorox solution. That will kill any algae residue. Follow that treatment with a swish in hot water to which a bit of dish detergent has been added. Rinse with plain water.

If the residue is from hard water you can remove the scale by rinsing the coins in (full strength) white vinegar followed by plain water.

Regards,
ProfHoff



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