I don't compete in scale either, but I expect to possibly next year with my Gee Bee Z. I have built scale and semi-scale models. I do sell scale graphics and paint masks to many modelers who do compete. My graphics have been on many award winning models, CL but mostly R/C, including first place at the NATS.
I will gladly tell you anything I can answer about designing, building and finishing scale and semi-scale models. A few photos of my efforts. Scale is great!
Charles