I do wish that the manufactures had let me read the instructions first, and maybe given them a few hints on how to write - but there you go. (They dont even have the excuse of the materials being a translation).
The first set of "experiments" end off with the cleaning of a penny with a mixture of vinegar and salt. Australia gave up "brown money" years ago, but lucky enough I had some copper coins from the UK stashed away in my "random currency" bottle!
So here is a before and after shot of Two New Pence.
And here is a question for anybody in the UK: How many of your coins still have "New Pence" rather than just "Pence" on them? They have not been New since 1971 (I think?)
Cheers and Happy New Year.
You can find more macro shots at Macro Monday.