| get down to your local art/craft/hobby store and get some artists pastels (make sure their not oil) you can hundreds of shades or you can get your basic earth tone or primary colours and mix them up.
to use them, rubb them down on some sandpaper making sure you have something under it to collect all the pigments. you can mix this as if it were pain to get the right tone.
you could use a matt varnish but if your going to be using pastels it would have to be a spray.
for the best results you might want to try giving your model a matt varnish first, then adding the weathering. then spraying with hair spray. hair spray seals in all the pastels but does not change the colour of them like a lot of spray cotes can.
hope this makes sence and helps.
__________________ ...One finished model...5 O'Clock in the morning! |