Same thing happened to the Dura Touch finish on my Super X3. It wasn't bug spray or anything else YOU did. It's just a flawed product from Winchester/Browning.
I called their customer service and the guy told me the Dura Touch isn't supposed to do that.........but it does. Told me to send it back to them and they'd fix it. COOL BEANS !!! So I sent it to them.............. They received the gun on March 5th, 2018. You get an on-line service tracking number so you can watch the gun's "progress". My Estimated Completion Date was August 7, 2018. Somewhere in October, I called them to see if my gun was lost or what ?? Guy said "We're working on February/March guns now, so........" So, OK............
Just ran my service tracking number through the Browning website now. As of 04:00 today, my gun has not "progressed" any farther than it was in October when I last called. I hate to look a gift horse in the mouth because, as I understand it, they are doing a complete refurbishment of the gun for me for FREE. But, DANGIT !!!!!!!!! It's been over 9 months !!!!! What if that was my only turkey gun
When I sent it off, I expected I'd likely have it back for last spring season.......... Now it's looking like I ain't gonna get it back for THIS spring season..............
So.....................after my rant, and in a nutshell........... If it is your ONLY shotgun, go buy another cheap one to use for a year or so. Call Browning's customer service. Send them your gun for a refurbishment. Be PAINFULLY patient. Their customer service apparently sucks.