can't find tamiya matt acryllic (1st choice as am very new to airbrushing and would prefer to leave enamels for now) but read somewhere here that you can use WICKES matt varnish (water soluble)..have used this for woodworking and is a great product, fast drying, easy clean and good finish..
question is, is this true..? and would it need thinning and what with..?

many thanks guys,
rgds stu