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I am doing an experiment to remove varnish from boards to detect gold underneath. I took different boards with weak gold plating on them and used a remover. The varnish was completely removed, but all the gold remained. The entire process is shown. Yandex Zen: https://zen.yandex.ru/id/5f585c4a93d1... YouTube: / @ЛёняДич Rutube: https://rutube.ru/channel/24488578/ #varnish #boards #gold #copper #precious metals #radio components #gilding #how to remove #remedy