Bob, I should probably have said, that now I use only acrylics for painting. I have not tried mixing enamels and acrylics on the same figure, but from information over the net, acrylic is ok over enamel, but not the other way around. A few years ago I used to prime with a brush the Humbrol 1 enamel. But I switched to spraying the same primer, but in acrylic. Much quicker with same results, or even better, as it is easier to get a thinner coat with spraying.