Another siding is along side Scott's Metalworks. Again built with foam board and card stock with acrylic paint. Signage is printed with my inkjet printer on tissue paper
(wrapping paper tissue) and then applied to the building with thinned Elmers glue. You see some signs printed this way om the other buildings including the brick building. I like this method because I can make my own signs with lettering and/or images I find on the web.
I select or make the image I want to print and usually test print with black onto a piece of bond paper. Then I cut a piece of tissue paper and lay it over the printed image. I tape the leading edge with a couple small pieces of scotch tape and reload the paper into printer. Then print in color.
Some inks will run when wet. If needed you can over spray the ink with Testors Dulcoat to set the ink.
I apply the tissue with Elmers. Usually I spread it with my finger using a little water to thin the glue. Gently press the tissue into the surface so it sinks into the surface texture. Don't over do it as tissue when wet becomes fragile. After it has dried you can use a sharpe exacto to cut the tissue where needed and reapply the glue pressing the tissue so it adheres well.
You can create your own decals and signs with this method. I use this method for buildings, street signs, rolling stock etc.
Of course - printers do not print white. I usually use the Paint program to create lettered signage and will reverse the colors so the background has color and the letters are basically clear. Then I prepaint the area I am applying the sign to flat white ( I use acrylic ). When the tissue is applied the letters appear white.
The attached image was made using the white letter method described.
The Coca Cola sign on this building was made from an image I got from Bing Images and printed on tissue. You can see it is an effective way to make a decal at no cost that is unique to your model. You can size the images to fit your specific application. Creating something specific to the era or location is easy.
The tissue idea sounds fine. Have you ever tried printing the signs, etc. on clear decal paper? This is available from Micro Scale (best I have used) and others. It might help to line up several images to print at one time. I have used this method for several years and like the way the signs look and the ease of use...well, it is a decal.
____________________ It doesn't matter if you win or lose, its' how you rig the game.