In case anyone else struggles with this one, I am hoping I can share my experience to save you some pain.
I searched here for settings for JPPlus faux leather and had been working with that info and tweaking things to get the right settings. But when I got to the black, I completely messed up. The black engraves to silver, and I was engraving too deeply and it was showing as black. Scoring also seems to need a little tweak to get the optimal color.
So if anyone else searches and needs this info:
450 / 8 / 195 LPI (this is what gave me the pretty silver engrave in the test pic)
black: 500 / 10
browns/grays: 500 / 15
There is more than one way to skin a cat, and i know I can slow down the speed and lower the power, but this is just what worked well for me.
My messy test engrave scrap. lol Not very organized with this one.