I use the finaltoon plugin or toss it in sketchup... Both are very nice 'hand replicators'
Here is finaltoon... notice the depth que thickness on the lines as well (thicker in the foreground thinner in the background):
I like to use finaltoon even in material correct renderings to 'soften' them.. There is something about a little hand faking that really relaxes a client (if you know what I mean). It takes them out of the 'is that a real photo' mindset...
Detail (the sharp black lines on the glass (right) were also done with a finaltoon material):
