We have an original Philadelphia Chippendale (1750-1780) chair. Some time in recent history, before we got it, it got a small chip. I know originality is essential to antiques collectors, and there is no way in going to refinish it or do anything like that. That said, the chair has been in the family forever, so while it is valuable, value isn't my main intent. I just want the wood to be protected and not stand out as a chip. Any suggestions? I'm not sure what was used back then, or what my approach might be. Any guidance would be appreciated. Thanks!