I'd also be interested to hear some does and don'ts, tips and tricks as well if you'd be willing to share
These were the 1/18th scale, so pretty big models that had screws and not rivets to disassemble. The body's I didn't sand, I powder blasted with a little handheld sand blaster at low pressure, it didn't take much to remove the black paint. All the models were the same color at start. I used a non-etching primer, was not wanting to sand them after I primed them and then painted. I am a body and paint pro by trade when I started my career, but no longer in it.
The decals were the hardest, have messed around with graphics for about 20 years now, so that went pretty smooth. I just used CorelDraw and Decal Maker.
However, these are smaller scale, not sure how they would turn out. I would test one for you, but I don't have any inkjet printers any longer. I may could dig one up at work, maybe.
These were done almost 15 years ago, so I'm surprised they still look good.
Hope this helps.
Later
Kev