Today I reflowed 219b LEDs onto the FWAA MCPCB that I painted glow paint onto. Instead of peeling the paint off, I did a test.

I put the board on my hotplate set to 200C, the glow paint started to glow, but it did not burn. I replaced the 3 LEDs and all is well

nothing bad happened to the acrylic paint, the glow dots still work after the reflow.