Of course we've seen it before and when his face got fixed (For good?), but have we ever seen his full face after the mask Burn? Everyone says that it's supposed to be horrific, but have we ever actually seen It? I heard that there was an older issue of Namor that showed us. If so, which one, and can anyone provide a Scan? Thanks.
There was no mask burn. The damage was done by the explosion. You're confusing the scenes where Kristoff gets subjected to the Remembrancer.
If you look back at the Lee/Kirby origin, the monk is handling the mask with his bare hands. And immediately after, Doom is speaking without exhibiting any reaction.
In Secret Wars #3 (2015), he does take off his mask