I don't think it would be as much of an FR problem - Me262s are generally few and far between, compared to bomber groups.
Flying Lightnings for the Headhunters, you get used to your a/c trailing multiple smoke, oil, and/or vapor trails from combat damage. And I'm talking about an effect that is maybe only 25% of the intensity of those - just enough to hint at the exhaust.
Good idea, Motherland.