Set a pen tool as above and scribble across the canvas until you have a similar lock to the one below.



Apply the Filter > Distort > Wave effect with the standard settings. Then Edit > Fade Wave. Repeat this another two times but don't fade the wave on the last round it should look something like this.



Apply the Filter > Blur > Radical Blur Zoom 50%.
Click Edit > Fade Radical Blur > 75%.



Set the eraser as above and brush lightly across the canvas until you have a smilar look to the one below




Apply a Filter > Blur > Gaussian Blur set the radius so you get the required detail of airbushing Apply > edit > Transform > Distort to create the required shape.



Here's an example of use




Important note: The author is not a natural English speaker and there is a high chance of mistakes in every way. Corrections and comments are welcome.