As promised a few posts ago, I had bought some decal paper and here are my results. The paper comes in two types, laser and inkjet- get the right sort for your printer!
I made up a master sheet in Word, resizing images that can be found on google, these are warning signs etc as can be seen in the first photo. Notice I printed them right at the top of the sheet, this paper is expensive so I have maximised the useage, it means next time I can slip what is left into the printer.
This is what I found with using the stuff, it prints ok and then you overpaint with a thin layer of clearcoat (laquer, varnish,polyurethane etc) I used my airbrush and gave them two coats. This layer forms a barrier to actually carry the ink. Then its cut them out and use like commercial decals.
In practice this is how it went. The instructions say to use on glossy surfaces, I concur with that. I applied my first two on top of satin cote clear enamel from Humbrol, the decals stuck immediately, allowing no adjustment at all.