There's an interesting contemporary case of this going on regarding tobacco advertising. Because it's illegal in certain jurisdictions to distribute tobacco advertisements, some historical photographs have to be doctored for distribution there.

Take a look at the MP4/4 F1 race car shown on McLaren's website for an example: https://www.mclaren.com/racing/heritage/cars/1988-formula-1-...

Compared to an unedited version of the car: https://www.motorsport.com/f1/photos/ayrton-senna-mclaren-mp...

They even do this to videos of old races.