…and Some More on PolyGlaze
I am ready to report results of my experiments.
Below is the promised photo of the tile with cracked Poly Glaze layer. The glaze was cracked on purpose (see my previous post).
Now the same tile covered with the second layer of Poly Glaze. This glaze is whitish in color when applied and then it becomes clear when it is completely dry. Because the glaze layer is deeper in the cracks, they appear darker in color.
And the final picture. The glaze is completely dry and transparent. The cracks are mostly gone. You can see traces of some of them if you look really close. If this were a real pendant I was trying to save, I would probably apply one more coat of Poly Glaze.
Conclusion: PolyGlaze forms cracks if cured at lower temperature. The cracks may be fixed by applying a layer or two of Poly Glaze on top of them. However, I would recommend avoiding this problem rather then trying to fix it.