Welcome to BBF!
I am not sure if a battery-pull is the best advice for this since you mentioned you dropped your BB in the sand but member jack55 has tried changing faceplates on his 8320 and was successful. You might want to read up about his procedure as I'm sure that'd help you along with the tools you'd need. It's here > Crimsom Red faceplate install procedure for Blackberry Curve
Should you feel like you no longer wish to proceed, there's always horizonwirelessonline.com for repairs.