I'm no expert on Clichy but they do look like rose canes on the outside.
In terms of restoration have a look at this picture:http://glassgallery.yobunny.org.uk/displayimage.php?pos=-7890
Title:Collectors' Paperweights price guide and catalogue
Author: Lawrence H. Selman
Publisher: Paperweight Press, Santa Cruz, California
Copyright: 1986, L.H. Selman Ltd.
I dont have a scanner so took a picture out of one of my books. It gives a sense of what a good restorer can do.
Restoration seems to depend on how much "free" glass there is as the restorer basically peels layers of glass off until the damge is removed. IMHO I would not restore the base until I have seen what the top looks like if it is restored, the reason I say this is that the base does not play such a critical role in a millefiori weight as it does in a clear base lampwork weight, as I said MHO.
PS: Mods please have a look at the pic and description and decide if it is OK in terms of copyright.Mod: citation included.