Dip, dip, dip,
Gandalf,
Dipping is fine, it removes the tarnish quick, when you remove tarnish by this method you actually remove the silver, or silver plate.
An alternative for you to consider.
Buy gong back to grade 9 chemestry class you can convert the tarnish back to silver.
(If you have a bundy it ma not be so important, but if you have a heirloom quality instrument, you may wish to preserve every ounce of silver.)
What you need
1 plastic container ( shallow ) that all of your key work will fit in ( just submerged in water)
Tin foil ( shiney side up) to line the bottom of the plastic container)
HOT water ( wait for it to boil, let it est off the heat for a min.)
2 Tbl spoons of Calgon water softener ( baking soda )
1 Tbl spoon of salt.
Method
Line the container with foil shiney side up
Add HOT water
Add water softener
Add salt
Stirr
Add key work
And watch the tarnish transfer from the key work to the shiney side of the tin foil.
Remving tarnish from key work with a dip, or by using the above method does not leave the keys with a lusterous finish. If you looking for that then you need to polish by hand, or use a vibratory polisher.
Hoping this helps.
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Joe Piccolo