Hi QSWO, I fumed for 12 hours using 26% ammonia and then finished in Osmo. No stain. Before I put the Osmo on the timber was kinda green but it just popped as soon as the clear oil went on.
Regarding the embossed stars I literally dampened the wood and gently punched them one by one and then went over it again. I dabbled with ink stamping, carving and branding but this gave the best indentation and shadow. The fuming seemed to penetrate the pattern well too.