Ah, good question. I emailed Leupold to find out the answer. See attached email below. I will update the forum as soon as I get the results.
The other question I would ask yourself is this. Do you ever plan on taking the scope off of the gun? If the answer is yes or I don't know, I would not spray the scope. Take a camo material and wrap the scope with it. Same results, just no paint. The rest of the gun can be done. Just mask the scope off entirely and start painting...
Hope that helps... R.
EMAIL TO LEUPOLD CUSTOMER SERVICE:
I have a odd question for you. I am talking to several people on a predator hunting board that want to know if a Leupold scope is spray painted to camoflage it and something happens and it needs warranty work. Will you still cover it. Basically, does spray painting void the warranty?? Any info you have would be great. Thanks, Robert R. Moore