I'm not oiling lacquered or waxed barrels purposefully. If some oil gets on the exterior of the barrels as a result of cleaning the bores, or wiping down the rest of the gun after use, I have found that the wax finish can be compromised by the solution in use; specifically Balistol being the worst. This is a risk to the finish.

Regardless, I don't care for final result with wax and will focus on lacquer.