Vallejo have added a new range of acrylic colour washes to their product line-up and they make an interesting extra weapon in the modeller's arsenal of materials. Spirit-based colour-washes using enamel and oil paints are normally used by modellers, applied over the base layer of cured enamel or acrylic paint. But here we have heavily diluted, water-based acrylics for application over any base medium and knowing the tendency of acrylic paint to dry quickly, will they work? Most brands of this medium contain compounds to speed up their drying time as for most users, this is a desirable attribute, but Vallejo's acrylics are a little different in that they are more do not contain those additives and thus can be used in a similar (but still different) way to traditional enamel colour-washes. The products are very heavily diluted and some of the pigment had settled in our samples, so it's wise to unscrew the lid and give the contents a really good mix with an electric paint stirrer such as Trumpeter's. Once this had been done, the material shows great potential for many weathering effects and it's the tendency to stay put on the model's surface that separates them from spirit-based washes, allowing different weathering effects to be created.
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