Refurbing our HP4650, which is a decent enough printer but is picking up more than one sheet at a time. Anyway, in doing this it turns out half the toner cartridges are leaking toner, one badly enough to leave a streak down every page. Replacement seems to be the fix, but that leaves me with a cartridge with a significant amount of toner in. So...
Has anyone tried using toner as an enamel substitute? Obviously, it won't be very protective but wouldn't it make a nice thin, colourful layer if the toner was heated enough to melt? I was going to suggest PCB mask, but it's electrically conductive so probably not a good idea.