[Modges'66]

So, this is your lame excuse for not getting the interior into paint???
LOL! Just kidding!!!
A face shield & safety glasses are definitely a must when using a twisted wire brush with a grinder.
I did the entire bottom of my cab, inner fenders, and inside of the box sides this way in the heat of summer. I can remember being in the shower several hours after the fact, and finding wires sticking out of my chest, and in my shins!
You can never have too much protection!
Good thing that you are O.K!