I managed to take a better photo of the close-up of the faux crackle on the layout for the Aussie Scrap Source competition in November - remember the one you all voted for :)
5-6 layers of Clear embossing powder ( I don't have UTEE but it would've made the process faster) then pop it in the freezer for 10-15 mins then bend it to crack it. Not my own technique - I saw it on a Stampin' Up! demonstrator's blog who got it from Split Coast Stampers. Tried it out straight away and love it. I think it will be popping up again in future layouts.