As I've been thinking about doing some resticilling as I weather some cars, I was wondering about some common practices in doing so. We've all seen cars with the reporting marks and car numbers painted over, but do railroads ever just paint over the reporting marks and leave the original car number? I was thinking on my short line, it would be easier to just put my reporting letters above the original car number and call it good. Since it's a short line with minimal cars, car numbers in a series isn't really important. So there's the question: can I just replace the reporting marks and use original car numbers and still be prototypical or do I need to just re-number as well? Do any of you have photos of cars doing that? If I repainted a car, I'd of course renumber and letter it--I'm just talking about the re-stencilling at this time. Thanks in advance for your help and comments!