Hi Mallard,
Future is used as a low-cost alternative to commercial (modelling) clear gloss coats. There are several potential applications. Some people use it as an overall clear coat to protect the underlying paint before applying washes/filters. It's also used as a gloss coat for applying decals, as it helps prevent/reduce the incidence of "silvering" or trapping of air, which often occurs if decals are applied to a "flat" surface.
Unfortunately we don't have a direct equivalent of Future here in Australia. There are a couple of local alternatives which are similar, but not the same.
These are Johnson's "Pledge One Go", which is similar, but I believe it contains cleaning agents, and Pascoe's "Long Life". You should be able to find one or both of these in the floor cleaning products section of your local Coles or Woolworths supermarkets. To be honest, I'm not fond of either of these. I primarily use acrylic paints and both of these will attack acrylic paints to some extent, the "long Life" moreso than the Pledge.