I've been painting a plastic model using Tamiya paints (the TS and AS lines). I'm about done painting and ready to start decaling.

1. But before I apply decals, is it recommended that I apply a gloss coat to the model or will the decals look just as good if they're applied directly on the paint? Note that I intend to use microset and microsol when applying the decals.
2. If it's recommend to apply a gloss coat, is there a spray can version I can use? For instance, would TS-13 Tamiya Gloss Clear Spray be a good fit? Or perhaps Mr. Top Coat Gloss Spray? Please note that I don't have an airbrush so I'm limited to brush painting or spray cans.
3. Also, if I apply a gloss coat and then do decals, would I apply another gloss coat after decaling to finish the model off?

Thanks!

P.S. - The Tamiya TS and AS paints are synthetic lacquer. The AS is apparently a synthetic acrylic lacquer