I thought I would ask this since it's been bothering me for a while now. Is there any way for me to open this Duncan and be able to "re-seal" it? Reason being he has a lot of I don't even know what inside, it's weird gunk (might be a little hard to see)

[url=https://postimg.cc/zLpGY2zd]
[/url]When messaging the seller they said that they buy from storage units and that the stuff is probably "dust", I don't know about you, but that does not look like "dust".

This was on the 19th of Nov. so quite a bit ago now. Any help would be appreciated! I can also make a video showing off the Duncan up close if that helps but it'll have to be tomorrow. Thanks!