Home Depot carries Minwax Clear Brushing Lacquer in gloss and semi gloss. A 1 oz can is about $10.00 or so. I use and like it.

As someone already mentioned you can get colored lacquer paint from Jann's Netcraft. I also use and like this lacquer.

Another good choice for a clear gloss finish over thread or enamel, acrylic, etc. paint, (not lacquer) is Minwax Helmsman Spar Urethane. This is also available at Home Depot.

Later, Jim