[R-390] Paint advice needed

[Barry]

Hi, all.

I had the R390A front panel powder coated and now need to re-letter the
engraved lettering.  I tried this with acrylic enamel and, while the
lettering came out nicely, the enamel doesn't stick all that well to the
powder-coated surface.  I could easily peel the excess off with my
fingernail and the enamel is pretty easily wiped clean with something as
innocuous as denatured alcohol.

I'm wondering what to use to fill in the lettering.  I've read a bit about
acrylic lacquer.  Does anyone know if that would adhere any better to the
surface than the enamel?  What have others used on powder-coated panels?

Thanks,

Barry - N4BUQ