It is never too late to wipe the barrel down with a degreaser, like alcohol. If you have bare spots, its most often the result of a greasing fingerprint! Use the alcohol on the entire barrel, handle it carefully so it does not get anything greasy on it again, and continue applying the LM browning solution. You should be able to apply several coats a day. Do keep the bathroom steamy, by either using a humidifier, or running a hot shower several times a day. Just leave the door to the bathroom open , and the humidity will go out into the entire house, and help all your woodwork, and house plants survive the dry heat of winter heating better.