Yes, the panel lines are going to be a challenge. I may use clear lacquer to make a hard surface to scribe into, but I don't know just yet.
I gave thought to the resin casting idea. However, this would be so expensive to make molds of that I would have to charge a very high price. My moldmaking facilities are very limited and the finished resin parts would be of inferior quality. The combination of high expense and low quality would just not be fair to the purchaser in my opinion. It's a good idea, though!
Maybe, in the future, one of the short-run model manufacturers would consider taking on the SAAB B 17 if there is sufficient demand. Let's see how much interest there is in this project--that might encourage production by professionals!