wrote in message ...
Tim - I drilled the center of a piece of epoxy bar stock about 5/8 in.
thick. Then a brass weight was glued with epoxy to the bottom and a piece
of paper with the scale for a hydrometer was placed inside. Then a thin
top
was glued on with the tiniest gooping onto the the first number of the
paper
scale. Suprizingly, it looked noticebly better than the others.

Hul


A good solvent to clean up the interior void would be glacial acetic acid.
It melts the acrylic and then it hardens with a smoother surface. A couple
of droppersfull would do a small volume like this. Must be "glacial"(99%),
not "normal" or vinegar(~5%)

http://www.grainger.com/Grainger/LAB...131107153158:s

The thinnest Weld-on products would work too.

http://www.amazon.com/IPS-Weld-On-Ac.../dp/B000KZUTEM