Well, there's another odd item for me to be buying. I am also a plastic modeler and so far have bought the follwing items:

Cuticle scissors
Eyeliner (multi colors are great for weathering)
Pantyhose (to use for polishing and airbrush filters)
Nail polish
Nail files
Acrylic Nail Filler (like microballoons)
Acrylic Nail Solvent (Same stuff as Monokote Trim Solvent)
Quilters and coat thread
Coat Fabric

And now Hairspray.