you can paint over latex paint with latex enamel.
Yes, enamel paint will go over flat paint.
Enamel paint is basically a type of oil based paint. It can be defined as a semi or high-gloss paint that levels out all by itself. You spread it evenly with a brush, and then the strokes vanish; it forms an enamel surface. It works superlatively on a distinctive primer that equalizes the surface.
The liquid tempera paint is not waterproof because it is a water base paint.
yes
It is a semi-gloss texture enamel.
yes
Yes, with enamel paints.
emulsion paint: paint in which the binder is dispersed in water. enamel paint: pigmented varnish, glossy coating
No, you can't.
Enamel paint that has dried on a surface is no more or less flammable than other top coats. Many of the chemicals in enamel paint are combustible under the right conditions. It is advisable to store unused enamel paint, and many other household chemicals, in a safe environment.
Enamel paint.