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Tamiya XF-21 Sky is the pale green-grey "Sky" worn on the undersides of RAF aircraft — the classic Battle of Britain-era underside tone. Essential for accurate British WWII fighters and bombers.
At a glance
Flat (matt) finish acrylic
10ml glass jar
Water-soluble; thins with Tamiya X-20A
Part of the Tamiya XF (flat) range
Best for
RAF aircraft undersides
Battle of Britain-era schemes
Brushing or airbrushing once thinned
The authentic RAF underside ‘Sky’. Sprays smoothest thinned with Tamiya X-20A — a natural pairing.
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