Made from softwood. Retainer bars made from stainless steel.
https://knoba.files.wordpress.com/20...-blocks-02.jpg
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https://knoba.files.wordpress.com/20...-blocks-01.jpg
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Accurate profiling was obtained by inverting abrasive sheet on good sections of bodywork & working the tools to shape.
Page link: https://knoba.wordpress.com/2015/04/...r-style-lines/