Yes Enamel is working too. Just use enamel thinner to clean it, not lacquer..
Lacquer will kill this airbrush. I used Testor enamel paint with it and it was ok. but it died when I used Model Master Lacquer paint.
For Acrylic Model Master, try simple whater to thin. it work. But you need Acrylic thinner to "clean" since the paint is drying fast and water can't "melt" the paint and clean the airbrush.
Btw it's not a bad airbrush you have. Many others have worst. I think it can be a good second airbrush (I wish mine was still working, since sometime I would use both my Badger Anthem and this aztek.