This script replicates the Plastic Wrap filter in Photoshop.
To use the script click the icon above, and save it to your scripts folder. The script should be located under Filters>Light and Shadow>Plasti-wrap.
The process adds a mask to the image, so everything that you want to apply the effect to should be in one layer.
Note: The script is somewhat changeable, but the presets work best.
The "final layer Copy" simply duplicates the mask as many times as you like.
Also note that since this is a mask you can add other effects to it. That is covered more in Page 2.