Jimi looks good anywhere.
A metamorphosed limestone, I expect any calcium carbonate would react the same. Instead of micro-fracturing the surface like granite, marble is ablated.
Like @marmak3261 observed with Corian, I noticed tiny sparks - which turned out to be a very fine hot ash.
By the feel of my fingernail I would guess about a 100th" depth. The surface is bleached of all pigment and will receive color well. In this case trusty Krylon flat black spray.
Without the penny, the detail makes it impossible to guess the scale. Well done! Marble is a medium I intended to use a lot. Thanks Dave for confirming its “glowforgeness”.
I let the paint dry. It would definitely stain if you just wiped it off (could be an interesting effect) but generally in a positive/negative image the higher the contrast the better.
@PIGHEADED …OMG I want one of those giant pennies! Wait! Is it chocolate?? Now I want one even more!!! Lol__
(Miniaturists often include a penny in their photos for scale. And yet, some buyers still purchase mini’s thinking they’re buying a life-size object. Leading to an inside joke that all miniaturists have a giant penny that we use for photographs**** )
I let tit dry. That’s the magic of the masking. The laser is a two-in-one operation,engraving while ablating the tape and cutting a perfect mask at the same time. No sanding or finishing at all. Peel the mask and your done.
Weeding can be time consuming depending on the model.
I’m not familiar with the thickness of the dried paint from Krylon flat black spray. The engrave is not very deep. After the paint is applied can you still feel the engrave? Or is the paint above the surface of the marble?
Well seeing this reminded me that I drive past one of the counter-top places on the way home. Lots of remnant pieces in racks outside. Sounds like a field trip. Ha