I appreciate the heads up on the brake cleaner issue. I just started using it on the recommendation of another person and have not seen the problem you describe but perhaps it is time to stop using it. I was aware it would take the finish off of your wood stock and was not good for plastic but removing the bluing is a serious step. Perhaps it is time to put the stuff back in the garage.

Better yet, I have an old rifle barrel that I abuse all the time. I will really spray it down and see what happens to it. Again, thanks for the heads up.