find . -type d -exec chmod 755 {} \;
This will recursively search your directory tree (starting at dir ‘dot’) and chmod 755 all directories only.
Similarly, the following will chmod all files only (and ignore the directories):
find . -type f -exec chmod 644 {} \;
For removing ACL entries do:
find . -exec setfacl -b –remove-all {} \;
coooooooooooooooooooooooooooool