The following techniques are just one way of permanently weathering models which is not for everyone. For a simple how-to-weather pdf guide simply click on the link provided. It describes a step by step guide and some basic items you'll need to get started. Below is some additional info on weathering which in time will be incorporated in the pdf guide.
There are many other differnt methods and some far better than I have mastered. These can be found on various farm model forum websites and video examples on YouTube most of which are railway and train related
DUST ON THE MUDGUARDS - Large built up areas of lumpy clay is firstly done with a mixture of brown paint and casting powder (plaster-of-Paris) which is applied with a paintbrush. Use the bristles of a hard paint brush to roughen as it sets. Drying time around 15 minutes depending on the mixture. Next use fine dry clay dust (collect off a power harrow or dry some clay in an airing cupboard or bake in an oven) firstly airbrush the area with clear satin acrylic paint and sprinkle the clay on repeating the process to build up to the desired weathering effect.
Next apply using an airbrush a light dusting of a brown tan colour (Tamiya Flat Earth) over the model finishing with clear satin acrylic paint to seal everything. The satin varnish will flatten and tone down the colour of the model. To add more dust effect I brush on clay dust with a soft makeup brush and this can be then removed if required later. Note this method is permanent you can’t undo so practise first
RUST - To get a basic rust effect on the tractors is a firstly paint the area with clear satin acrylic paint and sprinkle some orange and brown dust of a dry pastel over the area gently brushing off excess as well as blending the edges back in the surrounding area. A example is the 1455XL international. Rusted and woren areas are achieved by painting some specks of white paint followed by some silver on the area to be weathered and gently rubbing dry pastels over the area for the rust effect. Dusting the models can then be done as described above. I hope that this simple description is of some help, remember practise first!
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A selection of models to illustrate various weathering effects
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download a how-to-guide by clicking on the image
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