Jack May
That Kiwi
I've tried air dusting (done it in the past successfully, but there appears to maybe be a oily film that teh dust is settled in and so dusting will not budge.
Soot content is reasonably minor and mainly building materials burnt so should have been a simple dry soot cleanup.
These are items of HIGH sentimental value as they are made by the lady and she can no longer make them. These are the two prize pieces she kept.
Help appreciated. John