[Trisquel-users] Trisquelize linux mint?

[shiretoko]

I have an old partition containing linux mint. Didn't use it since ages but  
i'm kind of running out of disk space...
can I trisquelize linux mint just like ubuntu?
They have almost the same repos, afaik.
And the version i'm running is rebecca, i.e. trusty .
Can I just replace "trusty" with "belenos" and replace the repo url with  
trisquel's repo?