On my first trip a few years back, my bags were searched along with the rest of the passengers on the plane.
It was quite lucky really that my friend had run out of room in his bags, so i had to put a few of his things in my hand luggage. Well when the guard/custom bloke opened my bag up, the was a thick layer of foam all over the top of my clothes due to a hastily placed bottle of shaving gel! Well the hand went in, then quicky came out along with "Fine sir, kindly move on!". So his hands never got as far as the rolex's!
So if you dont want to be searched, just spill loads of shaving foam in your bag!