I guess it is a bit abrasive and will destroy the nozzle by the time, but i buyed exactly for this use a spare nozzle in my local 3d Printer Shop. For the standard PLA, i will use the original nozzle which is came with the Flux. But also in the same Shop, i saw some special nozzle with hardened steel or different coatings for use with the abrasive Materials.
Yes, i've made only this prints with the laywood today, as it was just a test of the spare nozzle and the filament. But i guess, i will make other things with this filament, it looks very special.
And as you said already, also with 2 good eyes and not just on foto, you can't see any difference in the colour maybe i have to heat more for a darker taste?