Someone showed me this curious case:
To color the roses, he first put down a layer of white acrylic paint and then did the lilac color in waterbased dye over the white. he then sealed it with two coats of SuperSheen and then hit the whole belt with Tan Antique Gel. The lilac color instantly turned to yellow - luckily a rich golden yellow and the belt looked fine afterwards.
But it was not his intended result. I was able to test the same on his test rose that you see lying next to the belt. (The pic on the right was what he used to color the roses from.)
I put Tan Gel antique on the upper tip of the rose and as you can see, that turned yellow. Then I put Dark Brown Antique gel over the middle section and it had now effect on the lilac color at all.
Any suggestions?