Clearing Variables in Workspace on Simulink Pause

I'm currently trying to obfuscate variables that are loaded into Simulink via a .p file. Is there a way to do this? If someone were to pause the simulation, then the variables would remain in the workspace and viewable. I can't just use a pause-callback saying "clearvars", because that callback can easily be erased.

I know that I can run the model programmatically via the "sim" command in another .p file, which contains a try-catch block that clears variables on a catch (and therefore are never output to the workspace), but I'm wondering if I can establish the same functionality through the Simulink GUI.

Thanks in advance.