Override permission of field in rss

Hi, thank you so much for your wonderful module.

I'm trying to output an rss feed that includes a field that has restricted permissions on the site itself, but would like the field to show (open) on a rss feed that appears without logging in.

Just to clarify:

1. 'Contact info' field has premium permission on the website (only members can see)
2. Now I want to output a rss feed in a premium email newsletter where the 'contact info' field is available.

Ive tried 'Disable SQL rewriting' in the view, but still 'contact info' not available on the feed.

Is there a way around this please? Most appreciate any suggestions :)