I spent ages getting the colour settings right in photoshop to get it to print right. Most of the problems come from it laying down too much ink. The settings that work for my printer are the media as matt transparency (it's a cannon profile for that), the quality cranked, the colour as sRGB and the rendering as relative colormetric. It just took ages messing around with different options to get it looking right. It'll probably be something completely different for something else.
We don't do them like we used to. That tutorial was for when we used rattle cans. It was just your usual automotive primer/paint/lacquer. We got no running when we did it.
We're going to do a new tutorial shortly as we now use envirotex. But again, that's straight over the top with no trouble (other than drilling through it!).
