Hiding a symbol via Multi-State in ProcessBook

I'm trying to create a multi-state symbol using a haul truck from the symbol library.

For state 1, I want to completely hide (or white out) the haul truck as mine tonnage is below a certain level. For state 2, I want to display the haul truck. 

State 2 works well, however for state 1, the haul truck won't completely blank out... There a still some border lines that won't disappear. Please see attached images.

Any tips on how to hide or remove these border lines?

Thanks,

Colin