My soapmaking friends know the word 'rebatch' isn't in my soap vocabulary. I tried it once with unbelievably bad results. I added too much liquid and the soap never hardened. I ended up binning the batch.
So when I had this batch of vanilla musk soap refuse to unmold properly, I grated the rather ugly bars into fine bits, sprayed the shavings with only a dusting of water, and reformed the soap into balls. Once they'd hardened, I used a wet paintbrush to apply the dried flowers.
I was much happier reusing the soap this way. Maybe one day I'll learn to rebatch properly.