I created this 3d model straight from your greyscale with no modification. I use this technique almost exclusively now - although I have a dedicated touch probe scanner, I haven't touched it in years.
If I were you I would simply take a photo of the objects you wish to reproduce and photoshop it to an 8-bit greyscale. Increase of decrease the contrast to adjust relief depth. Once you get the hang of it, I find it is much easier, faster, and cleaner than trying to modify and clean up 3d scanner images.
The second image here is a toolpath of this relief done at 25mm, using a 15 degree vee point tool - showing that as you suspected it indeed would work very well. With a .09 mm wide tip, you can see that quite a bit of detail comes out with excellent surface finish - cutting another pass at 90 degrees to the first would give a nearly perfect surface and avoid the possibility of any "linen" lines from the curved surfaces at all.