Oh, honestly. Would it have killed you to have put on a little makeup or something, Red Skull? Or a rubber face-mask, perhaps? I know you have 'em; you use them at every opportunity. Or hell, even wrapping bandages around your face would've helped - it'll certainly add credence to your 'I've been sick' routine if you look like you've just gotten out of the hospital. But no, you've got to use the SHIELD as a mask! Sheer genius.
'Right this way, Captain - oh, I'm sorry for jostling you like HOLY CRAP WHAT HAPPENED TO YOUR FACE?! You look almost like... the RED SKULL!'
'Oh, eh, nein, nein, officer! It's the, eh, the reason I've been away, you see - someone fired a bullet at me, and it, eh, hit in the exact right place, and... Boom! Goodbye face!'
'Good god! You poor fellow! Are you sure you're feeling well enough?'
'The knowledge that I am helping my country shall help the pain - onward!'
'Yes, SIR! Right down there, sir! *wipes away a manly tear* Now, there's a REAL American.'