I'm wondering if there is a way to “lock” an image version so that it cannot be deleted. I know there are several safeguard already in Aperture (such as rejecting, then moving to trash and then finally emptying your computer's trash). Nevertheless for some images (such as images I use as textures) I'd like to be able to lock the image is much the same way you can in the Finder — except within Aperture.

Bill