Was just curious, is there a easy way of keepin the skin from a character from coming through the clothes?   simple pose as a girl crossing her arms and her skin pokes through .. anyway of stopping that?

Only to make sure the clothing is conformed , and with V4 remeber to magnetize the clothing with the provided pose.  You can try applying a bit of a morph or use magnets or postwork it out.

You can look at the joint zones in the clothing and see if they need to be a bit larger .

There is always complain to the vendor if its a regular occurance .

Ockham had a no-poke script but I never tried it .

If the clothing item completely encloses the limb and what markschum said hasn't worked you can alo try this: Use the hierarchy editor to hide the offending limb.
e.g. If it's a leg poking through a pair of jeans, hide the leg, you don't see it in jeans anyway!

The old postwork method is to render the entire scene first and export the image as png.  Make the body parts invisible, then area render the affected parts.  Export the image. Open your 2D program (Photoshop, PSP, etc.), open the images, and select the area render image.  In Photoshop, hold the shift key down and drag your selection to the fully rendered scene.  By doing this, the layers will match up and afterwards flatten all layers to create your intended scene.  It is a bit involved but it works all the time.