Can you remove the camera white balance setting in Aperture
I have a Canon 7D and use Aperture for processing and storing my images.
With the Canon I shoot both video and still and frequently adjust the white balance in the camera. I make a frequent mistake in leaving the wrong white balance setting on - eg when taking video indoors in the evening I set the white balance to indoors (the Canon seems poor at white balance decision making on video) and then I forget I'm not using auto white balance and switch to taking a photo with flash. The result is a horrible blue photo - which if I don't spot the problem at the time seems very hard to correct afterwards.
I use the Aperture white balance adjustments frequently but unless there is a patch or white or grey I an use the dropper on, I find this particular situation seems to be right off the scale of what I can fix in Aperture. I end up with sliders at the extremes of the scales and no intuitive sense of what numbers to type in manually to try and get realistic colour - so I often end up discarding these photos even if the shot itself is something I'd like to use.
So my question is given I'm importing RAW, is there a way to show the phoo without the (wrong) white balance setting I applied in the camera, to let me choose white balance from scratch?
Or if not, do you have any advice about how to adjust from this very bluey unrealistic colour of image?
iMac, OS X Mountain Lion, Aperture 3.4.3