Did it actively see combat? Or was this essentially just a stunt?
Yes it did fly like that for a few days. It was due to a misunderstanding between the pilot & the crew chief. I posted a link in Ghosts other thread about it but it is not working at present.
Long story short the pilot was talking to his crew chief that after the war there should be a memorial of a LA-7 done with the entire aircraft painted red. Then put on a platform for all to see. Some how the crew chief thought he wanted his painted red. So the next day when the pilot was scrambled he was shocked to find a bright red La-7 waiting for him. Supposedly the pilot was so upset he pulled his pistol & went looking for the crew chief to shoot him.
After a few days it was returned back to it's proper paint scheme.
No photos are known to exist of that scheme.
The story was recounted years later by the pilot himself in an interview.
The Germans who saw the plane had called him the Russian red baron.