Another option I have used for minor weepage is lapping the fittings. You add a little valve lapping compound around the male flare seal surface. Install the opposite fitting and just lightly snug up the nut.
Now rotate the fitting back and forth several times. Disassemble the fitting and inspect the sealing surfaces, you should have a nice even "lapped" ring on each angular surface.
You may have to repeat the process to remove any minor high or low spots on the seal surfaces. Clean all the grit off and reassemble the fittings with
oil or Never Seize on the threads. This process worked for me when I had damp fuel and
oil connections with the AN fittings...