"Clear varnish" refers to a transparent and glossy coating that is applied to a surface, usually wood, to give it a polished and protective finish. Full definition
Clear varnished archival pigment print mounted on Dibond, Satin poly finished fiberboard structure, Found object. (mkima.com)
Re-create the effect on an existing unit by unscrewing its drawer handles, then cut down wallpaper to fit the drawer fronts and paste into place, finishing with a protective coat of clear varnish over the top. (idealhome.co.uk)
Having been cleaned, the wheel undergoes final treatment, including sealing with clear varnish. (topspeed.com)