The Lockheed C-69 did fly some BAL missions. However, by that timeframe they were all likely to be unpainted aluminum with markings.
The C-69 originally entered service in late 1944 after many engine and other problems, and only 13 of an order for 22 were delivered as such, the remainder delivered to airlines (including TWA) as L-049s at the end of the war. These differed from the L-049A primarily in having "eyebrow windows" over the cockpit and 1-stage superchargers.
The USAAF C-69s were initially painted in OD over grey. I liked the scheme, but few pictures can be found except for the prototype, emblazoned with Lockheed insignia and a civil registration number. That prototype, contract number 43-10309, later did enter operational service.
After some investigation of USAAF painting regs, I concluded that it likely carried a "ship number" 310309 on the tail, and a squadron hull number 01.
I used the freeware CalClassic FS2004/FSX TWA L-049 Constellation and some busy Photoshop work to produce my "imaginary" C-69 for the BAL mission.
The original C-69s had only a 1-stage supercharger. They later were all upgraded.
See attached image. Now, to go fly it!