After receiving answers to my post, I am editing it to reduce clutter in the forum.
Thanks to @asdffdsa for pointing me into the right direction.
Asked for feature is already supported by rclone!
Short description
I used a feature in CarodDav (windows) so as to encode files and folder names when uploaded to gdrive. Issue is that google stopped acepting registrations for access to gdrive for any version of CarotDav (oauth issues) and author is not updating the code. Nice and free code, anyhow.
I proposed to include the encoding algorithm is rclone. Would be nice, but unnecesary.
Solution using current functionality:
Workaround to solve my issue is:
use “rclone serve webdav remote:folder” with needed config; this will start a webdav server in 127.0.0.1:8080 (default)
use carotdav to connect to that webdav, configuring the option to encode files/folders.
Tested and working!
Alternatively, one can mount a remote with rclone, and use localhost access in CarotDav (should work but did not try).