I'm one of the people who provides Molly with such logo masks, if you need help with it. ^_^

EDIT: Here's a sample (sorry, no comparison :<) of delogo'd ITV4 Batman I had handy. The ITV4 logo was at the top left corner. http://imgur.com/a/IL2gd (Ignore the replaced FOX bumper.) The less grain and less macroblocking there is, the better it works. Another important factors are 1) how and with what settings the delogo mask was made and 2) the opaqueness/transparency and the colours in the logo.