An old trick to protect your shiny new bike is to slap loud and ugly paint all over it. Much more subtle is Dominic Wilcox's temporary rust stickers, that are "designed to make your beautiful bike/car look rusted and scratched so that passing thieves assume it's not worth stealing due to its apparent shabbyness."
The inventor notes that he put them on his new bike 13 days ago and it has not been stolen yet, which he considers "probably equates to 7 years of non-stealing in the friendly countryside." Only £3.99, a lot cheaper than my lock....
before and after pix below the fold..