I had a scope get specs all over the front objective lens coating before. I don't believe it was from the smoke after the shot. I actually realized that the damage came from when I stood the gun upright and I swabbed the barrel between shots and as I pulled the patch out of the barrel some of the residue was falling off the patch and spilling off the edge of the barrel and onto my lens which was facing up. If you put a flip open scope cap on your front scope lens and just remember to shut it before loading or swabbing between each shot your lens coatings should be fine. I would clean your lenses after each shooting session with a good optical lens cleaner just to get rid of any residue left from the smoke. Just my opinion.
