This might explain the why of it-
https://www.bullseyeglass.com/method...ity-chart.html (yes, I know it's BE but the ingredients are probably the same) Sometimes those reactions are a very good thing with dots and so forth but not so great with organics.
You might try making stringers with orange enamels (like white covered in orange enamels), like Thompson's or clear coating the Effetre orange. But that might still bleed through if you're going for organic.