I have used decal paper from beldecal.com, from decalpaper.com and from Amazon. My printer is just a cheapy Epson inkjet. Did you seal the paper with a clear coat after you printed before it got wet?
For vinyl I use either Greenstar or Oracle outdoor vinyl that I cut on a Cameo Silhouette.
For waterslide I print on clear or white (depending on the design) waterslide decal paper on an Epson inkjet then spray light coats of UV Resistant Klylon clear before I dip them in water.
Jaw has dropped on the floor! You have once again raised the bar to such an extremely high level that I now know I must quit model rocketry and just get a train set. Outstanding work, my friend! Outstanding!
I use Adobe Illustrator for the design work and then print on Bell Decal paper using my inkjet. A few light coats of Krylon Crystal Clear UV Resistant clear coat and they are ready for dipping into water.....
I have used Ceatex Auto Air and Ceatex Airbrush paints. They are both great for rockets and spraying indoors with easy cleanup. I agree with the post above that Hobby Lobby is a decent source. And if you get one bottle at a time you can use their 40% off coupon. Michaels used to sell it but...
Absolutely. I have used many aerosol primers (mostly Rust-Oleum Painter's Touch because I love the way it sands) underneath the Createx airbrush paint. Createx also makes a Sealer White and Sealer Dark which are basically primers that I have used between the primer and Auto Air Pearl paints.