Even a more basic question that I have, is, how to find or print out new labels or decals to cover the names on the buildings? This applies to Lionel and Railking structures as well. I've kitbashed dozens, maybe a hundred or so buildings yet I've never learned an expedient method to change the name.
I thought of cutting out names from magazines and printing from the free domain of the internet, using white glue, etc., but is there a better result-producing method that doesn't involve software applications and spending countless hours behind my laptop? Graphics is an art form IMO, and I suppose like everything else it requires copious attention to detail and research, but I thought I'd ask the question to see if anyone has found a shortcut 
Well, in fact, IMHO software and computers *are* the best shortcut by far, and that's without a great investment in either time or money. Once you have or can create a digital image you want to translate to the real world (or back to the real world, if you began with a photograph!), it's a simple matter to rotate, skew and resize it to fit your needs, then print it on a suitable backing, ranging from cardstock (for standalone rigidity), to any of a variety of papers (glossy, photo, matte, self-stick labels, etc.), to a number of transparent film or decal stocks.
Almost any reasonably contemporary computer can suffice, but if you plan on serious graphic manipulation, more serious processing speed and copious memory will make life easier. Similarly, just about any color printer will do (even monochrome in a pinch), but one with better capabilities will make the results more satisfactory.
In my own case, I've had good results printing on self-stick mailing labels, either filling in a blanks space, or covering a sign or logo you're trying to cover over, and on other materials:
Plain white van, with logo added from on-line source, on self-stick label:
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Coca-Cola truck, repurposed with two sizes of graphic lifted from photo of building sign (also on label):
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Trolleys, rebadged for my layout's local line (also labels):
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Signs on 'electrical substation' (created to cover relay), printed on heavy-duty glossy paper:
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Copies of magazines and sign board on newsstand, on regular printer paper:
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And finally (and incidentally the only Menards item I've included), an illuminated billboard, which I populated with a localized sign, printed on glossy paper stock:
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All of the above I produced with a decidedly ordinary computer and laser color printer, and rather pedestrian software. Those with graphic skills can far exceed my efforts, but IMHO even duffers like me shouldn't refrain from envisioning and carrying out a wide range of similar projects, at need.