mq stores the patches in the .hg\patches\
folder as files without an extension.
You can copy or email those files and use hg qimport FILE
on the other end to bring them into the patch queue on the other repository. Note that if you copy it directly to the target .hg\patches\
folder, you'll need to use the --existing
switch so hg
knows to not create the file.
The .hg/patches
folder, by the way, can be a repository in itself to track changes in the patch queue itself. You can init it with hg init --mq
and commit the current patches by hg com --mq
.