I wrote about my semi-opaque Japanese watercolor tests today on my other blog, but here I'll just note that my iridescent paints show the brush strokes even on this paper (Clairefontaine mixed media black), so I think I understand how heavily to lay it on now to show fewer strokes. Also, the colors look very gray and brown on white paper UNLESS you view them at an angle, so I better understand how to use them there, too.
It's nice to take time to test these things out, rather than suffer disappointment on some drawing I've spent ages on...