Globally delete text from a PDF?

Hi,
Firstly, my apologies for wading in with a question that may have been asked. The forum search didn't turn it up but I'm not sure I searched with the right terms.
I'm trying to remove all the text from a PDF to leave the vector images behind - that way I can use the images as a test. I don't mind if it's a solution like making all the text white, just as long as it's invisible in the document.
I had thought this would be reasonably straightforward but I've been looking around for about a day now and no luck. I installed the pdfbox library which had an example code snippet to do this, but my abilities ran short.
Any ideas?
I'm using Acrobat 9 Pro v9.4.6 on Mac OS X 10.7.2 if that helps.
Thanks for reading, and for any help.
Cheers,
Matthew.

George - THANK YOU!
When I pulled up the Profiles in the Preflight dialog, under Create PDF Layers there is a setting for "Put all text objects on a layer". I double-clicked this, gave it an output file name and off it went - lifted out tens of thousands of text objects from a several-hundred page PDF. Took an hour or so - but not too bad after all that searching and hassle. The layer turns off nicely - I presume that will carry over when I print it!
I had no idea that Preflight was capable of this kind of manipulation, but in hindsight it makes sense.
THANK YOU again.

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