I did two varnish tests. The first was very light even after several coats, the second too dark. So I took the varnish left over from Jayne's fiddle, thinned it, strained it twice, and added a fairly small amount of black artist's oil paint. I can always add more, I can't "add less". I intend the Sinister to be medium grey, and Ashley's to be transparent black, I'll either do extra coats on Ashley's, or make a separate batch of varnish with more colour in it.