how to migrate from magic fields to custompress

hey there,
I'm testing out new template which uses Visual Composer, however, it doesn't seem to read custom posts. Current website uses Magic Fields for custom posts.
I have a lot of content on the site and quite a few custom posts/taxonomies/fields.
Would it be possible to migrate from Magic Fields to CustomPress without a major pain? What'd be the best way to do that?

Thanks,
Adam