A few years ago I emailed Andreas Harrison, the guy who ran the Chronicles of the Arixo Air Defense Force website, about the decals he used on his aircraft models. He told me he used special decal paper and printed the roundels and insignia directly from his computer.
If you're looking for noseart, Il-2 comes with a large variety of noseart for American planes. I could try to find a way to send them to you if you want.
Good judgement comes from experience. Experience comes from bad judgement.
"Is it heavy?" "Yes." "Then it's expensive - put 'em back." -Jurassic Park
With me surprises are rarely unexpected. - Any Pink Panther movie