unrar'ing everything in subdirectories without getting into a loop

So I've been trying to unrar multiple .rar files in lots of different folders. Some are packed a little differently and looping is causing a problem. - folder 1 - file.part01.rar - file.part02.rar - ... - folder 2 - file.r01 - file.r02 - file.rar - folder 3 - file1.rar - file2.rar - ... after doing for f in *.rar; do unrar e $f;done or something similar, it gets into a loop and keeps unrar'ing files it's already done. This is because part01.rar & part02.rar both are rar files and satisfies the command. Is there anything I could do to stop this loop? I have over 50 folders so don't want to go through all of them individually.