I’n not surprised by the tear-out. When your initial post popped up in my mailbox, I thought, “Uh-oh. I wouldn’t be running a piece through the planer after routing out that level of detail.” Sanding is a much safer approach, but I doubt you could sand after melting wax into the relief. One approach might be to sand it, blow out the dust, then seal it with poly. You could then add the colored wax, wipe it off the raised sections, then seal it all again with a couple more coats of poly.