What I like about the combination is the feel of the resulting image. It's all about colour and shape/form, and less about the object photographed. I realise that this isn't everybody's cup of tea, so I won't be at all offended if you don't like the result.
Here is an example of a before-and-after comparison:
|Colour bleed, Wattamolla|
So, tell me what you think of these images.