Hiding partitions

Hi. Not sure this is actually possible but I'm hoping there's a way to hide certain partitions. I've got three internal hard drives, one of which has a small partition for exclusive use as Photoshop's scratch disk. This really doesn't need to be on the desktop and with space being taken up by something that's never going to be clicked. But I don't want to hide the larger partition or the Mac HDD so I can't just uncheck the show hard drives option in Finder preferences. What I'd like to do is something similar to the trick with the drive that Windows lives on and just make it invisible apart from Disk Utility, or maybe the Finder sidebar - yeah, I could live with that. But it's clearly not as simple as renaming it with a '.' on the front. Any suggestions?