Showing excerpts to non-members

[accessart]

Hi. the site in question is http://www.accessart.org.uk/studioproject

I have protected page using tags, categories and posts.

My question is this: is there a way for non members to see the same excerpts a member sees when he searches via tags or the drop down category menu? (as a teaser). I'm using buddypress and made a simple child theme based upon bp-default.

If not, what is the best way, or work around, for me to show non-members teaser excerpts?

Many thanks

Paula