If your product has a cloudy finish, you can use a multi-purpose clear gloss finish/sealer. Start by placing your project in a cardboard box in a well-ventilated area. The working conditions should be less than 75% humidity.
Alternatively, you can do a seal/flood pour on top and brush it on with a grey foam brush. Make sure to let it dry for at least 24 hours. This will add a clear glass-like finish.