Well if you’re going to be doing oil or enamel (MiG, AK) washes and weathering you want an acrylic gloss clear coat to seal the decals and the paint in. You can buy any number of brands of manufacturers acrylic clear gloss coats, but I’m a veteran Future fanatic. I know, I know, they don’t make Future any more, but there’s now an official replacement:
Holloway House Quick Shine Multi-Surface Floor Finish. Same as the original Future. Available at Wal-Mart. Tell all your friends. You shoot it straight from the bottle.