I've had this happen once, but just in case I'll post it.
I got attacked by a guy with a flame thrower and afterwards, my Power Armor stuck with the orange "on fire" texture, even in dialogue cut scenes. Only a reload fixed it.
[[http://www.afkmods.com/uploads/gallery/album_88/gallery_3051_88_303224.jpg|Wastelands]]
[[http://www.afkmods.com/uploads/gallery/album_88/gallery_3051_88_249495.jpg|Cutscene]]
It does make an interesting "paint job" for the Power Armor, although stealth would be horrible