Hi Ossi,
Well, you can add HTML tags to the exclusion list, so they dont get stripped, under the Advanced Options -> Content panel.
To skip most tags enter these into the exclude tags field:
<abbr><b><p><a><span><font><ul><ol><li><nav>
However this still does not mean, that the styling is applied correctly via the browser, as the CSS might be constructed specifically for the posts scope.