How to clean aluminum coasters
by
Jan
+2
coasters seem to have minerals from water on them...
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Try ketchup sounds wild I know but the acid in it help remove certain discoloration on brass and copper....worth a shot! If not I'd try baking soda and lemon juice
I have a huge collection of aluminum platters, trays, bowls, ice buckets, and coasters! After trying various cleaners, I now clean them with SOS scouring pads.
http://www.howtocleanstuff.net/how-to-clean-and-polish-aluminum/
You can try rubbing some lemon over it to clean it