I used Miracle 511 on honed, hand-polished marble in 2010. I resealed once around the sink, but not on the perimeter counter, and they are fine. No stains, but If I get a slight etch, I polish it out with a smooth damp sanding sponge, or add a bit of polishing powder.

The Miracle 511 impregnates the stone to prevent stains, but cannot prevent etches from acidic solutions. Recently someone in my household (who shall remain nameless, because no one will admit to it) set a drippy pickle jar beside the sink, and now I have a perfect arc of an etch--I can even see the imprints of the tiny glass nubs on the bottom of the jar. He/she didn't wipe it up, and by the time I found it, the etch was too deep to polish out. On the bright side--it kind of matches the pattern of the stone, so I doubt anyone but me will ever notice it, and with all marble etches, you have to be looking at it from a certain angle.

Sorry, can't give you any info on new products.

It will polish out, you just need a grinder and some diamond pads to do it. And an operator experienced enough not to "orange peel" the marble.

Right, Joe, I should have said 'too deep to hand-polish out.' I honed and polished the stone originally with a palm sander, and graduated grits of sand paper and sanding sponges, so maybe someday when I'm ready to reseal, I'll try it again. But that's not even the worst etch, and after eight years, I'm more relaxed about the appearance, so it might be awhile. ;) I have a feeling Laura R will feel the same way.