I am after some help.

I need a thermoplastic which can be cast, i.e. have a low melt viscosity. I want to process the thermoplastic at as low a temperature as possible so a low melt viscosity would be appreciated.

I want to pour the plastic into a mold, to encapsulate a metal component.

The metal component is then manipulated, the plastic protects the parts.

After processing I want to remove the plastic, by melting I guess. Residues could be removed by solvent if necessary.

I would like to reuse the plastic as many times as possible.