I actually had three T-rex's 2 600 an 1 700 but problems when they went flybarless caused me to give it up and move over to planes, I did all fiberglass and foam repairs for the guys who crashed which is how I got started airbrushing, how to did you know I had a T-rex
I've never heard of the Solarfilm, everything I flew that wasn't foam had Oracover, most of what I had was from Sebart, my last plane didn't even get maiden and was sold along with all my radio gear and chargers and such, all I have left now is a 6 - 25 amp power supply and my little iron for putting on the Oracover, like i said I miss it so might get back onto it one day, I certainly enjoyed the indoor flying with shock flyers and still have all the stuff I need to make those except for the depron
For all the model repairs and painting I used a Multi primer we have here called Sudwest allgrund primer, it's ideal for metal fiberglass, polyester and just about everything else, I even use it now for my art boards instead of gesso because it is self leveling and flows to a beautiful smooth finish with no sanding other than a light scuff before artwork.