Assuming the light 'BKF Spray' is Bar Keepers Friend? If using it to remove rust, BKF might be a bit overkill on carbon steel blades like 1095 - the spotting on the blades is evidence of that. The oxalic acid in BKF is pretty aggressive on steel (iron & iron oxides) and even on stainless steel, if it's overused or left in contact too long. It'll etch or pit the steel if left in contact too long.
If it were me, I'd be considering more conservative means to remove rust. The polishing pastes suggested earlier, like Flitz or Simichrome, would be one option for cleaning up rust on highly polished carbon steel blades, while bypassing the use of the BKF on carbon steel blades altogether.
BKF has its good uses and works impressively for specific tasks. But it's best to weigh that against the potential risks as well, so it's not doing damage of another kind in the process of trying to clean something up.
