Future floor polish is actually a clear acrylic floor covering (not a floor wax). A liter bottle costs about $4. It is extremely inexpensive when compared to clear coats made by model companies ($3-4 for a tiny ½ oz. bottle).
It can be brushed on, air brushed on, or aircraft canopies can be dipped in it an left to dry on a plate. It takes out the scratches on the clear parts. Most use Future to "seal" their finish before applying decals and weathering. After that is done, you apply a dull coat to take away the sheen Future leaves.