This is entirely Kevins idea if it looks bad, naturally it is mine if it works!!
When Kevin was with us over Christmas he said he had been using Alpaca fibre (of which we have quite a lot!!) as smoke and dust in his Mexican games he had been demoing around the shows for Shellhole Scenics
Anyway I thought I would have a look – and the photo shows how it looks. I reckon quite good as dust clouds behind the vehicles as they rush across the desert.