I think the trend is away from silver as a primer/filler coat because of low adhesion.
One of Mr Urtnowskis thingo's ( on the Cradinal ?? ) goes on about mixing the silver with the dope ,
after the first two coats , so it builds as you go , and is semi translucent .
With the Sig COLOUR Dope , he talks on the tapes of leaving it standing for a year , so the colour goes into
the bottom half of the jar / can , then pouring off the top half ( clear now ) to get ' pigment enrichmwent .
According to him , he had a hand in the Brodak dope , which is like sitting on super glue .
sorry .
Thus this has sufficent pigment for a couple of coats to cover admirably .
Thinking of trying the silver acrylic clear I have in Sig Litecoat on current project , as other dope here ( Aus. ) is non gloss
or is Tolulol , which deems to crack up .