Is there a way to clear formatting?

I am having issues trying to clear formatting.  ApplyFormatOperation uses the apply method with the incoming TextLayoutFormat.  If I pass in a blank TextLayoutFormat then none of the formatting will change since all of the attributes are set to inherited and passing in null doesn't seem to work either. 

If there is no good way to do it using ApplyFormatOperation or anything else currently built into TLF what do you think a custom operation that would accomplish this look like?

Thanks,

Joel