I pretty much do exactly what Alastair does. The dropper is a far better method as it doesn't take much puff to blow your ballast out of position if you use a mist sprayer.
I would also recommend looking at the Noch ballast if you can find it. I have tried it recently and it is ground rock rather than what ever that other stuff Woodland scenics uses is. I found it particularly good at resembling crushed granite for Scottish railways. Colour and texture is just right.
I would also recommend looking at the Noch ballast if you can find it. I have tried it recently and it is ground rock rather than what ever that other stuff Woodland scenics uses is. I found it particularly good at resembling crushed granite for Scottish railways. Colour and texture is just right.