Is there a way to lock many files at once?
I'm aware of that doing a "Get info" will allow me to change the lock status, but with hundreds of files in a folder this isn't very practical.
Open the folder - highlight whichever files you want to lock or press Command A to highlight all. Hold down Command & Option keys and press 'i' key. This will open the multiple Get info window. Check the Lock box. Now - whichever files have been checked will be locked.