Being artistically challenged, I had dropped my RV7A off at the paint shop with a few photos of a paint scheme I liked and was going to leave it for the painter to modify etc. Then I listened to the webinar mentioned above. The part that got me concerned was the statement made that the worst thing you can do is let the guy with the tape design your paint scheme...
So I got nervous and hired scheme designers to help me. They did a stellar job, giving me quick feed back on each idea change, sending computer generated sketches of the ideas so it was easy to actually see the ideas etc. The end product was a very professionally done paint specification that was very detailed with all dimensions clearly specified etc.
Another advantage of using this service is the owner knows just about all the paint shops in the country and beyond and can probably give feedback on any paint shop you might be considering, or maybe recommend one if your looking.
In my case I just happened to have my plane in one of the very best shops in the US and probably did not have to worry after all, but I am certainly happy with the end result.
I will add that using the service made the paint job more expensive, but much of that effect was of my own doing as I chose to add effects that I liked in the sketches that were sent. Without that feedback I probably would have kept the scheme less complicated and less expensive. However, I am very glad I did what I did and recommend the services of Schemedesigners to anyone in a similar situation.
I would also add that Don Copeland and his son Chris at Arizona Aeropainting in Eloy AZ were a pleasure to work with and did a great job on my project. Once I her her home and get some good photos I will post some.