Well, this is embarrassing - I misremembered the challenge dates and thought the Saran Wrap challenge was due tomorrow, not yesterday! I am still rocking my YRNails checked decals but not long ago at all I tried out the saran wrap method and absolutely loved the results.
You just paint your nails a base colour, then when it's fully dried you paint over it with another colour then dab it with clingfilm to get this effect! It's so easy and gives such a cool result.
Here are the other lovely bloggers who did this challenge: