New answers tagged materials
1
I poured a little vinegar into the container. It killed the mold, i.e., the black disappeared. This also adds moisture to the spackle which helps if it is a little dried out. Note that there is a chemical reaction (a few bubbles form) because vinegar is acidic and spackle is a base . However, this did not appear to degrade the spackle in any way. In fact the ...
6
They are iron ( unlikely steel at that age ) identified by the density match to iron. The reddish color that looks like granite is rust on a pitted surface. Pig iron ( high carbon and silicon ) or wrought iron ( more or less pure iron ). An unusual shape for either as far as I know. My guess is that they are raw material intended to be made into something. A ...
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