The Mr.Hobby GSI-H20 Flat Clear is a 10ml water-based acrylic topcoat from the Gunze Aqueous Hobby Color series, built for hobbyists finishing plastic kits and tiny figures. Its formulation produces a stable, matte surface that reduces glare and helps photographs capture true colours.
Apply this flat clear to aircraft, armour and figure projects when you need a subdued finish that highlights paintwork without shine. It works well over both painted and weathered surfaces to unify the final appearance.
GSI-H20 is favoured for its straightforward water cleanup, predictable drying and compatibility with common hobby primers and paints. It is a practical choice when you want consistent mattification with minimal fuss.
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