IRL, I used ebony timbermate on my spalted maple. I would have no reservations about doing it on a quilt or something. Just dont sand the veneer first. apply the timbermate and wait for it to dry till the next day. then lightly sand it off only using 240 - just to take off the excess timbermate but stop as soon as the veneer is showing, then use 320 to take the majority of the timbermate off but again stop if high points are becoming really light, then maybe 400 if necessary in the "valleys". Spalted maple was really ripply so i had to make this up in the finishing stage by putting a lot of coats downand sanding flat. but in the end i had a grain pop without going through the veneer.

I have also mixed DT stain with neutral timbermate. Not a problem. I wished I had gone a bit darker you need to put a lot of stain in there. although its a waterbased putty and DT was oil based, it was not a problem. don't know about spirit based stains though, would probably test on some scrap wood.