I have a question about how to best preserve an object which is of some historical value - is that on topic here?
No that question is not really on topic here. Taken from the Help Center:
What topics can I ask about here?
History Stack Exchange is for historians and history buffs. If you have a question about:
- Historical events Cultures and historical practices
- Famous people
- Ancient Languages
- Factual current political history questions
Then you are in the right place.
It is not about:
- Asking for reference material
- Questions answered by a simple Google search or to be found in a Wikipedia page
- Predicting the future based on historical trends
- Conspiracy Theories or Pseudo-science
Please look around to see if your question has been asked before. It’s also OK to ask and answer your own question.
However, all hope is not lost. As the Help Center continues:
If your question is not specifically on-topic for History Stack Exchange, it may be on topic for another Stack Exchange site. If no site currently exists that will accept your question, you may commit to or propose a new site at Area51, the place where new Stack Exchange communities are democratically created.