The powders are pure metals, not colours, and are unsuitable for painting. Please note that we cannot guarantee colours, and that enough should be in hand of the same shade for the whole job in hand.
Quantities of Fillers: In general, a rule of thumb is equal parts by volume plus a little more filler (based on Multi-Purpose resin at room temperature).
A guide to weight ratios of metal fillers to one part of Multi-Purpose resin is:
Bronze: 6 or 7
Brass: 5 or 6
Copper: 4 or 5
Iron: 6 or 7