Tried an experiment today

[olsarge]

I went to my local Wal-Mart today to get some grass seed and as usual wound up in the craft section.  I purchased two folk art craft paints.  One was a green/gold paint heavily laced with glitter and the other was a blue/purple color shift.  I have an old crank bait with a broken bill that I have been using for my testing.  I sprayed one side with an opaque white and the other side opaque black.  First up was the green and gold.  It was quite thick which is normal for craft paints and needed quite a bit of thinning.  Sprayed the white side and you could not even tell that I had sprayed it.  Sprayed the black side and up jumped the devil.  Absolutely gorgeous.  There was a lot of glitter flying around though and I am sure it will clog the brush if not thinned enough.  Next up was the blue/purple.  Again the white side showed up as an ugly green.  The black side was a splendid blue purple shift.  Again, it required thinning but was pretty easy and I anticipate no prob!ems using it.  Some color shifts require a white base but others (actually most of them in my experience require black).  This was a fun experiment and I will be doing more just like it in the future.
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[ctom]

Just my experience with using quite a few different color shift pigments is that over black gets the most dramatic shift. Anything over white is a waste of time unless you are looking for an interference color over the white. Try your blue /purple over a real dark purple or dark blue....you might find an interesting shift there.