Fantastic stuff Daniel! Wojtek has the right idea regarding the paper patterns, it'll make things a lot easier. Now that I've seen the covering in place, the 'corrugations' don't look that bad. Rather than use the tape/filler method discussed, it would possibly be easier, and give a smoother finish, if you used glass-fibre bandage/tape. Wrap it around so that it bridges the gap between the raised part and the 'trench' of the corrugations, fix in place with the fixer or resin that you can get at the same place as the 'bandage', then 'paint' it with the finishing resin. It might take 24 to 48 hours to 'cure' properly, but, when hard, you'll be able to sand it smooth and match the surrounding surfaces. Once primed and painted, the finish overall will be as smooth as glass, and should look brilliant. If in doubt about how to use the glass-fibre materials, ask at the store you get it from; most times they'll give advice, or a leaflet. In the UK, 'Isopon', which I think is originally from the U.S., provide guidance hints/tips leaflets etc. If not, your local library will have something, either in the car-body repair/maintenance section, or in boat-building.
It's really coming on well, can't wait to see it ready for painting and detailing!