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Why didn't it work!
You might have used an expensive brand of
polish - this doesn't slick very well as is too thick - great for nails, but
terrible for oil slick technique!
You may have left it too long before putting
the card into the water - you oil slick can dry - if this happenes you'll
get a stringy blob looking a little like shrivelled cling wrap plastic -
not very nice!
You might have 'caught' an oil slick, or part
of one, when you were putting the card into the water. The polish
won't stick properly to itself so you will get a result like at right, or you may get a silvery/pearly patches. |