Welcome to TreasureNet! Glad to hear I didn't turn you off to to posting further finds by my joking around. There are folks here who can ID a wide range of items. This one is tough, being caked up iron. It likely wouldn't hurt the item underneath with some light tapping with a hammer. -but that's just my view, and others may suggest a softer gentler approach... Or even electrolysis (easier than is sounds!)...so I might pop up in future threads with other items.
Slag I do see treasure symbols a space treasure you have to know how to read the signs!!! pass it here dude